- NEET Biology Chapter 1 The Fundamental Unit Of Life Multiple Choice Questions
- NEET Biology Chapter 1 The Fundamental Unit Of Life Question And Answers
- NEET Biology Chapter 3 Diversity In Living Organisms Multiple Choice Questions
- NEET Biology Chapter 5 Natural Resources Multiple Choice Questions
- NEET Biology Chapter 5 Natural Resources Question And Answers
- NEET Biology Chapter 6 Improvement In Food Resources Question And Answers
- NEET Chemistry Chapter 1 Matter In Our Surrounding Question And Answers
- NEET Chemistry Chapter 2 Is Matter Around Us Question And Answers
- NEET Chemistry Chapter 3 Atoms And Molecules Question And Answers
- NEET Physics Chapter 1 Motion Mcqs With Answers
- NEET Physics Chapter 1 Motion Question And Answers
- NEET Physics Chapter 3 Gravitation MCQs with Answers
- NEET Physics Chapter 4 Structure Of Atom Question And Answers
- NEET Physics Chapter 5 Sound Multiple Choice Questions
- NEET Physics Chapter 5 Sound Questions And Answers
NEET Foundation
NEET Biology Chapter 1 The Fundamental Unit Of Life Multiple Choice Questions
NEET Biology Chapter 1 The Fundamental Unit Of Life Multiple Choice Questions
Question 1. A science student was viewing a rose plant cell through an electron microscope, where the student observed the presence of a hard rigid wall and a very thin delicate wall in the cell enclosing the cytoplasm.
How can we call that thin delicate wall?
- Cell wall
- Middle lamella
- Plasma membrane
- Nuclear membrane
Answer. 3. Plasma membrane
Question 2. Gaseous exchange in amoeba takes place through
- Osmosis
- Photosynthesis
- Diffusion
- Exosmosis
Answer. 3. Diffusion
Question 3. In ______, permease assists a molecule to diffuse through the membrane that it cannot penetrate alone.
- Facilitated transport or diffusion
- Active diffusion
- Osmosis
- Pinocytosis
Answer. 1. Facilitated transport or diffusion
Question 4. Name the ‘energy currency of the cell’.
- GTP
- ATP
- DTP
- ADP
Answer. 2. ATP
Question 5. Phagocytosis is
- Cell eating
- Cell drinking
- Cell death
- Cell vomiting
Answer. 1. Cell eating
Question 6. Pinocytosis is
- Cell eating
- Cell drinking
- Cell death
- Cell vomiting
Answer. 2. Cell drinking
Question 7. Exocytosis is
- Cell eating
- Cell drinking
- Cell death
- Cell vomiting
Answer. 4. Cell vomiting
Question 8. The cell wall consists of minute cellulose fibres called
- Microfibrils
- Microsomes
- Microtubules
- Microns
Answer. 1. Microfibrils
Question 9. Name the ’protein factories of a cell’.
- Peroxisomes
- Lysosomes
- Ribosomes
- Nucleus
Answer. 3. Ribosomes
Question 10. Genes are the discrete segments of
- RNA
- ATP
- mRNA
- DNA
Answer. 4. DNA
Question 11. ______ provides a specific shape to the chromosomes owing to its position.
- Centromere
- Centriole
- Peroxisome
- Oxysome
Answer. 1. Centromere
Question 12. Human beings have ______ pairs of chromosomes.
- 21
- 22
- 23
- 46
Answer. 3. 23
Question 13. Diffusion is fastest in
- Solid phase
- Liquid phase
- Semi-solid phase
- Gaseous phase
Answer. 4. Gaseous phase
Question 14. What will happen when a cell is kept in an isotonic solution?
- Shape of the cell changes.
- Size of the cell remains the same.
- Will shrink
- Will swell
Answer. 2. Size of the cell remains the same.
Question 15. The process of withdrawal of water from a cell through osmosis is called
- Endosmosis
- Exosmosis
- Both (a) and (b)
- None of these
Answer. 2. Exosmosis
Question 16. When exosmosis occurs in a plant cell, it is
- Plasmolysed
- Re-plasmolysed
- Non-plasmolysed
- None of these
Answer. 1. Plasmolysed
Question 17. Transport of substances across the plasmalemma against the concentration gradient is
- Active transport
- Passive transport
- Bulk transport
- All of these
Answer. 1. Active transport
Question 18. Unicellular freshwater animals and most plant cells tend to gain water through the process of
- Diffusion
- Osmosis
- Imbibition
- Facilitated diffusion
Answer. 3. Imbibition
Question 19. Fluid mosaic model of the plasma membrane was given by
- Schleiden and Schwann
- Singer and Nicolson
- Knoll and Ruska
- Huxley
Answer. 2. Singer and Nicolson
Question 20. The phenomenon by which protoplast of a cell shrinks from the wall is called
- Osmosis
- Plasmolysis
- Diffusion
- Glycolysis
Answer. 2. Plasmolysis
Question 21. Which of the following organelle is known as ‘suicidal bags’?
- Peroxisomes
- Lysosomes
- Endosomes
- Vacuoles
Answer. 2. Lysosomes
Question 22. Name the ‘powerhouse of the cell’.
- Chloroplast
- Chromoplast
- Mitochondrion
- Endoplasmic reticulum
Answer. 3. Mitochondrion
Question 23. In plant cells, Golgi apparatus is known as
- Dictyosomes
- Autosomes
- Oxisomes
- Golgi bodies
Answer. 1. Dictyosomes
Question 24. Light reaction of photosynthesis takes place in which part of chloroplast?
- Stroma
- Grana
- Cristae
- F1 particles
Answer. 2. Grana
Question 25. ______ serve as osmoregulatory organelles in protozoans.
- Vacuoles
- Vesicles
- Lumen
- Saccules
Answer. 1. Vacuoles
Question 26. Which one of the following has its own DNA?
- Mitochondria
- Dictyosome
- Lysosome
- Peroxisome
Answer. 1. Mitochondria
Question 27. The main arena of various types of activities of a cell is
- Plasma membrane
- Mitochondrion
- Cytoplasm
- Nucleus
Answer. 3. Cytoplasm
Question 28. In mitochondria, protons accumulate in the
- Outer membrane
- Inner membrane
- Intermembrane space
- Matrix
Answer. 3. Intermembrane space
Question 29. Which one of the following is not considered as a part of the endo-membrane system?
- Golgi complex
- Peroxisome
- Vacuole
- Lysosome
Answer. 2. Peroxisome
Question 30. Which one of the following organisms is not an example of eukaryotic cells?
- Escherichia coli
- Euglena viridis
- Amoeba proteus
- Paramecium caudatum
Answer. 1. Escherichia coli
Question 31. Which of the following can be made into crystal?
- A bacterium
- An amoeba
- A virus
- A sperm
Answer. 3. A virus
Question 32. A cell will swell up if
- The concentration of water molecules in the cell is higher than the concentration of water molecules in surrounding medium.
- The concentration of water molecules in surrounding medium is higher than water molecules concentration in the cell.
- The concentration of water molecules is same in the cell and in the surrounding medium.
- Concentration of water molecules does not matter.
Answer. 2. The concentration of water molecules in surrounding medium is higher than water molecules concentration in the cell.
Question 33. Chromosomes are made up of
- DNA
- Protein
- DNA and protein
- RNA
Answer. 3. DNA and protein
Question 34. Which of these options are not a function of ribosomes?
(1) It helps in the manufacture of protein molecules.
(2) It helps in the manufacture of enzymes.
(3) It helps in the manufacture of hormones.
(4) It helps in the manufacture of starch molecules.
- (1) and (2)
- (2) and (3)
- (3) and (4)
- (4) and (1)
Answer. 3. (3) and (4)
Question 35. Which of these is not related to endoplasmic reticulum?
- It behaves as transport channel for proteins between nucleus and cytoplasm.
- It transports materials between various regions in cytoplasm.
- It can be the site of energy generation.
- It can be the site for some biochemical activities of the cell.
Answer. 3. It can be the site of energy generation.
Question 36. Following are a few definitions of osmosis, soread carefully and select the correct definition.
- Movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane.
- Movement of solvent molecules from its higher concentration to lower concentration.
- Movement of solvent molecules from higher concentration to lower concentration of solution through a permeable membrane.
- Movement of solute molecules from lower concentration to higher concentration of solution through a semipermeable membrane.
Answer. 1. Movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane.
Question 37. Plasmolysis in a plant cell is defined as
- Breakdown (lysis) of plasma membrane in hypotonic medium.
- Shrinkage of cytoplasm in hypertonic medium.
- Shrinkage of nucleoplasm
- None of the above
Answer. 2. Shrinkage of cytoplasm in hypertonic medium.
Question 38. Which of the following is covered by a single membrane?
- Mitochondria
- Vacuole
- Lysosome
- Plastid
Answer. 2. Vacuole
Question 39. Find out the false sentence.
- Golgi apparatus is involved with the formation of lysosomes.
- Nucleus, mitochondria and plastid have DNA and hence, they are able to make their own structural proteins.
- Mitochondria is said to be the power house of the cell as ATP is generated in them.
- Cytoplasm is known as protoplasm.
Answer. 1. Golgi apparatus is involved with the formation of lysosomes.
Question 40. Find out the correct sentence.
- Enzymes packed in lysosomes are made through RER (rough endoplasmic reticulum).
- Rough endoplasmic reticulum and smooth endoplasmic reticulum produce lipid and protein, respectively.
- Endoplasmic reticulum is related with the destruction of plasma membrane.
- Nucleoid is present inside the nucleoplasm of eukaryotic nucleus.
Answer. 1. Rough endoplasmic reticulum and smooth endoplasmic reticulum produce lipid and protein, respectively.
Question 41. Which cell organelle plays a crucial role in detoxifying many poisons and drugs in a cell?
- Golgi apparatus
- Lysosomes
- Smooth endoplasmic reticulum
- Vacuoles
Answer. 3. Smooth endoplasmic reticulum
Question 42. The proteins and lipids, essential for building the cell membrane are manufactured by
- Rough endoplasmic reticulum
- Golgi apparatus
- Plasma membrane
- Mitochondria
Answer. 1. Rough endoplasmic reticulum
Question 43. The undefined nuclear region of prokaryotes are also known as
- Nucleus
- Nucleolus
- Nucleic acid
- Nucleoid
Answer. 4. Nucleoid
Question 44. The cell organelle involved in forming complex sugars from simple sugars are
- Endoplasmic reticulum
- Ribosomes
- Plastids
- Golgi apparatus
Answer. 4. Golgi apparatus
Question 45. Which out of the following is not a function of vacuole?
- Storage
- Providing turgidity and rigidity to the cell.
- Waste excretion
- Locomotion
Answer. 4. Locomotion
Question 46. Amoeba acquires its food through a process, termed as
- Exocytosis
- Endocytosis
- Plasmolysis
- Exocytosis and endocytosis
Answer. 2. Endocytosis
Question 47. The cell wall of which one of these is not made up of cellulose?
- Bacteria
- Hydrilla
- Mango tree
- Cactus
Answer. 1. Bacteria
Question 48. Silver nitrate solution is used to study
- Endoplasmic reticulum
- Golgi apparatus
- Nucleus
- Mitochondria
Answer. 2. Golgi apparatus
Question 49. Organelle other than nucleus, containing DNA is
- Endoplasmic reticulum
- Golgi apparatus
- Mitochondria
- Lysosome
Answer. 3. Mitochondria
Question 50. Kitchen of the cell is
- Mitochondria
- Endoplasmic reticulum
- Chloroplast
- Golgi apparatus
Answer. 3. Chloroplast
Question 51. Lipid molecules in the cell are sythesized by
- Smooth endoplasmic reticulum
- Rough endoplasmic reticulum
- Golgi apparatus
- Plastids
Answer. 1. Smooth endoplasmic reticulum
Question 52. Cell arising from pre-existing cell was stated by
- Haeckel
- Virchow
- Hooke
- Schleiden
Answer. 2. Virchow
Question 53. Cell theory was given by
- Schleiden and Schwann
- Virchow
- Hooke
- Haeckel
Answer. 1. Schleiden and Schwann
Question 54. The only cell organelle seen in prokaryotic cell is
- Mitochondria
- Ribosomes
- Plastids
- Lysosomes
Answer. 2. Ribosomes
Question 55. Organelle without a cell membrane is
- Ribosome
- Golgi apparatus
- Chloroplast
- Nucleus
Answer. 1. Ribosome
Question 56. 1 μm is
- 10-6 m
- 10-9 m
- 10-10 m
- 10-3 m
Answer. 1. 10-6 m
Question 57. Lysosome arises from
- Endoplasmic reticulum
- Golgi apparatus
- Nucleus
- Mitochondria
Answer. 2. Golgi apparatus
Question 58. Living cells were discovered by
- Robert Hooke
- Purkinje
- Leeuwenhoek
- Robert Brown
Answer. 3. Leeuwenhoek
Question 59. Select the odd one out from the following.
- The movement of water across a semipermeable membrane is affected by the amount of substances dissolved in it.
- Membranes are made of organic molecules like proteins and lipids.
- Molecules soluble in organic solvents can easily pass through the membrane.
- Plasma membranes contain chitin sugar in plants.
Answer. 4. Plasma membranes contain chitin sugar in plants.
NEET Physics Chapter 1 Motion Question And Answers
NEET Physics Chapter 1 Motion Question And Answers
Question 1. What is the difference between speed and velocity?
Answer:
Difference between speed and velocity
The distance travelled per second by a body is called speed. It is a scalar quantity. It does not tell the direction of motion. Speed is always positive and value of average speed is never zero.
While distance travelled per second by the moving object in the specified direction is called velocity. It is a vector quantity. Velocity tells us the speed as well as direction of motion. It can be positive as well as negative. The average velocity can be zero.
Question 2. Differentiate between acceleration and retardation.
Answer:
Difference between acceleration and retardation
The rate of change of velocity with respect to time is called acceleration. While decrease in velocity per unit time is called retardation.
Question 3. How uniform acceleration different than variable acceleration?
Answer: When equal change in velocity takes place in equal interval of time, then it is called uniform acceleration. If the change in velocity is not same in the same interval of time, then it is called variable acceleration.
Question 4. Define acceleration due to gravity.
Answer:
Acceleration due to gravity
When an object falls freely, the acceleration produced in the body due to Earth’s gravitational attraction is called acceleration due to gravity. It is denoted by letter g is its value is 9.8 m/s2.
Question 5. What does the slope of distance-time graph denote?
Answer:
The slope of distance-time graph denote
The slope of distance-time graph denotes the magnitude of speed.
Question 6. What does the slope of the velocity-time graph denote?
Answer:
The slope of velocity-time graph denote:
The slope of velocity-time graph denotes the magnitude of acceleration.
Question 7. What does the slope of displacement-time graph denote?
Answer:
The slope of the displacement-time graph denotes:
The slope of the displacement-time graph denotes the magnitude of velocity.
Question 8. What does the area enclosed under the velocity-time graph denote?
Answer:
The area enclosed under velocity-time graph denote:
The area enclosed under the velocity-time graph denotes the magnitude of displacement.
Question 9. Write all three equations of motion.
Answer:
There are three equations of motion.
The expression for the first equation of motion is:
v = u + at
The expression for a second equation of motion is:
S = ut + 1/2 at2
The expression for a third equation of motion is:
v2 – u2 = 2aS
Where, u = Initial velocity, v = final velocity, a = acceleration S = distance travelled
Question 10. Define uniform circular motion.
Answer:
Uniform circular motion:
If an object is moving with a velocity of constant magnitude on a circular path, then its motion is known as uniform circular motion.
Question 11. A car runs at a uniform speed of 70 km/hr from Bangalore to Mysore in 2 hours. Find the distance between two cities.
Answer: 140 km
Question 12. Rita goes to the market, which is 10 km away from her home. She travelled back 5 km in the opposite direction and stopped at the park. What is the total distance travelled and her displacement?
Answer: Displacement = 5 m Distance = 15 m
Question 13. Rahul initially at rest runs with a constant acceleration of 5 ms-2. He travels a distance of 10 m. Calculate the final velocity and time taken.
Answer: V = 10 m/s, t = 2 s
Question 14. Write all the three equations of motion.
Answer:
There are three equations of motion.
The expression for first equation of motion is:
v = u + at
The expression for second equation of motion is:
S = ut + 1/2 at2
The expression for third equation of motion is:
v2 – u2 = 2aS
Where, u = Initial velocity, v = final velocity, a = acceleration S = distance travelled
Question 15. Define uniform circular motion.
Answer:
Uniform circular motion:
If an object is moving with velocity of constant magnitude on a circular path, then its motion is known as uniform circular motion.
NEET Physics Chapter 5 Sound Questions And Answers
NEET Physics Chapter 5 Sound Questions And Answers
Question 1. Define sound.
Answer:
Sound:
A sound is a form of energy that propagates from one place to another through a medium.
Question 2. How is the sound produced?
Answer:
Sound is produced when an object vibrates. Vibration is the rapid to and fro motion of an object.
Question 3. Sound is a form of energy. Explain.
Answer:
Sound is a form of energy:
Mechanical energy is required to start vibrations in an object producing sound. The vibrations of objects are transmitted in a medium in waveforms from one point to the next and so on. These waves on reaching our ears produce vibrations in the eardrum which are perceived as sound by us. Thus, sound is a form of energy.
Question 4. Sound cannot be produced in a body if it’s not vibrating. (True/False)
Answer. True
Question 1. Describe various uses of multiple reflections of sound.
Answer:
Various uses of multiple reflections of sound:
Multiple reflections of sound are used to measure the depth of the sea or ocean. It is also used to detect the position of objects for example sea rocks, hidden icebergs in the sea, and ocean shipwrecks. It is also used to investigate problems inside the human body.
Question 5. What is the range of hearing of a human being?
Answer:
Range of hearing of human being:
The range of hearing of a human being is the sound of frequency between 20 Hz to 20000 Hz.
Question 6. Define infrasonic and ultrasonic sounds.
Answer:
Infrasonic and ultrasonic sounds:
The sound of frequency less than 20 Hz is called infrasonic sound while the sound of frequency greater than 20 kHz is called ultrasonic sound.
Question 7. What are the additional properties of ultrasound?
Answer:
The additional properties carried by ultrasound are:
- The energy carried is very high.
- It can travel along a well-defined straight path. It does not bend appreciably at the edges of the obstacle because of its small wavelength.
Question 8. What are the various applications of ultrasound?
Answer:
The various applications of ultrasound are:
- Bats avoid obstacles in their path by producing and hearing the ultrasound.
- It is used in drilling holes and making cuts of desired shape in the glass.
- It is used in cleaning very small objects like parts of watches or other electronic items.
- It is used for the detection of defects in the metals.
- It is widely used for imaging of human organs.
- It is used in human surgery to remove cataracts and in kidneys to break the stone into fine grains.
- It is used in SONAR (Sound navigation and ranging)
Question 9. A sound source sends waves of 400 Hz. It produces waves of wavelength 2.5 m. What is the velocity of sound waves?
Answer. 1000 m/s
Question 10. The period of a vibrating body is 0.05 s. What is the frequency of waves that it emits?
Answer. 20 Hz
Question 11. A bat can hear the sound of frequencies up to 120 kHz. Determine the minimum wavelength of sound that it can hear. The speed of sound in air is 344 m/s.
Answer. 2.867 x 10-3 m
Question 12. A wave pulse of frequency 200 Hz, on a string, moves a distance of 8 m in 0.05 s. Calculate the wavelength of the wave on a string.
Answer. 0.8 m
Question 13. If the velocity of sound in air is 340 m/s and the frequency is 256 Hz. What will be the wavelength?
Answer. 1.25 m
NEET Biology Chapter 5 Natural Resources Multiple Choice Questions
NEET Biology Chapter 5 Natural Resources Multiple Choice Questions
Question 1. An inexhaustible resource is ______.
- Soil
- Minerals
- Solar energy
- Fossil fuels
Answer. 3. Solar energy
Question 2. Which of the following(s) is a constituent of SPM?
- Dust
- Smoke and soot
- Fly ash
- All the above
Answer. 4. All the above
Question 3. Air is a mixture of
- Nitrogen, oxygen, carbon monoxide, water vapour
- Nitrogen, carbon dioxide, oxygen, carbon monoxide
- Nitrogen, oxygen, methane, carbon dioxide
- Nitrogen, oxygen, water vapour, carbon dioxide
Answer. 4. Nitrogen, oxygen, water vapour, carbon dioxide
Question 4. Green plants in an ecosystem are referred to as
- Consumer
- Producer
- Decomposer
- None of the above
Answer. 2. Producer
Question 5. Which of the following is not a renewable resource?
- Soil
- Minerals
- Forests
- Underground water
Answer. 4. Underground water
Question 6. Greenhouse gases are caused by which of the following?
- Industries
- Rhizobium
- Lightening
- All the above
Answer. 4. All the above
Question 7. Nitrogen fixation can be done by which of the following?
- Industries
- Rhizobium
- Lightening
- All the above
Answer. 4. All the above
Question 8. On moon, the temperature ranges from –190° C to 110° C. This effect occurs due to which of the following?
- No water bodies present
- Water bodies present.
- No biogeochemical cycle.
- No atmosphere
Answer. 4. No atmosphere
Question 9. Depletion of ozone molecules in the stratosphere is due to which of the following?
- Chlorine compound
- Fluorine compound
- Halogen compound
- None of these
Answer. 3. Halogen compound
Question 10. According to central pollution control board, particles that are responsible for causing great harm to human health are of the diameter
- 2.50 µm
- 5.00 µm
- 10.00 µm
- 7.5 µm
Answer. 1. 2.50 µm
Question 11. Metal generally present in polluted air is
- cadmium
- lead
- mercury
- zinc
Answer. 2. lead
Question 12. Pollutants emitted by jet aeroplanes in outer atmosphere fluorocarbon are known as
- smog
- photochemical oxidants
- aerosols
- loess
Answer. 3. aerosols
Question 13. Acid rain is rainfall with a pH of
- 7
- 6.56
- 5.65
- 11
Answer. 3. 5.65
Question 14. Algal bloom in a lake
- increases the carbon dioxide level
- leads to oxygen depletion
- kills fishes
- all of these
Answer. 4. all of these
Question 15. Water pollution is best assessed by determining the
- DO
- BOD and turbidity.
- DO and acidity.
- hardness and alkalinity.
Answer. 2. BOD and turbidity.
Question 16. Which of the following is not a factor responsible for the occurrence of soil erosion?
- Dust storm
- Heavy rains
- Cyclones
- Flood
Answer. 3. Cyclones
Question 17. Which of the following is not a property of alluvial soil?
- Layered
- Contains smooth round particles
- Rich in humus
- Suitable for growing pulses
Answer. 4. Suitable for growing pulses
Question 18. Measurement of clay particles in soil is about ___________.
- 0.5 mm
- 0.05 mm
- 5 mm
- 50 mm
Answer. 2. 0.05 mm
Question 19. The breakdown of complex substances by living organisms, such as lichens and bryophytes is termed as
- biological weathering
- chemical weathering
- physical weathering
- paedogenesis
Answer. 4. paedogenesis
Question 20. Which of the following is not an effect of ozone depletion?
- Skin cancer
- Poor digestion
- Damage to eyes
- Damages immune system
Answer. 2. Poor digestion
Question 21. Cycling materials are stored in reservoirs or sinks and become unavailable to living organisms, this process is called
- organic sink
- inorganic sink
- carbon sink
- phosphorus sink
Answer. 3. carbon sink
Question 22. What is the percentage of oxygen in air?
- 29
- 71
- 46
- 21
Answer. 4. 21
Question 23. Which of the following is the role of azotobacter in the soil?
- Nitrogen fixation
- Ammonification
- Nitrification
- Denitrification
Answer. 1. Nitrogen fixation
NEET Biology Chapter 3 Diversity In Living Organisms Multiple Choice Questions
NEET Biology Chapter 3 Diversity In Living Organisms Multiple Choice Questions
Question 1. Sponges belong to which of the following phylum?
- Porifera
- Cnidaria
- Ctenophora
- Platyhelminthes
Answer. 1. Porifera
Question 2. Corals belong to which of the following phylum?
- Porifera
- Cnidaria
- Ctenophora
- Platyhelminthes
Answer. 2. Cnidaria
Question 3. In which of the phylum, two tentacles and eight longitudinal rows of ciliary comb plates for locomotion are there?
- Porifera
- Cnidaria
- Ctenophora
- Platyhelminthes
Answer. 3. Ctenophora
Question 4. Flatworms are included in which of the following phylum?
- Porifera
- Cnidaria
- Ctenophora
- Platyhelminthes
Answer. 4. Platyhelminthes
Question 5. Which phylum of animals is also called flatworms?
- Porifera
- Coelenterata
- Platyhelminthes
- Nematoda
Answer. 3. Platyhelminthes
Question 6. What does arthropod means?
- Bony legs
- Cartilaginous legs
- Largest legs
- Jointed legs
Answer. 4. Jointed legs
Question 7. What is not poisoning among these?
- Scorpion
- Centipede
- Spider
- Crab
Answer. 4. Crab
Question 8. The excretory system in annelids consist of tubes called
- flame cells
- metanephridia
- nephridia
- protonephridia
Answer. 3. nephridia
Question 9. In which organism flame cells form the excretory system?
- Flatworms
- Earthworms
- Insects
- Crabs
Answer. 1. Flatworms
Question 10. Which of the following are found filamentous?
- Spirogyra
- Euglena
- Chlamydomonas
- Amoeba
Answer. 1. Spirogyra
Question 11. Find out the incorrect statement from the following.
- Protista includes unicellular eukaryotic organisms.
- Whittaker considered cell structure, mode and source of nutrition for classifying the organisms in five kingdoms.
- Both Monera and Protista may be autotrophic and heterotrophic.
- Monerans have well-defined nucleus.
Answer. 4. Monerans have well-defined nucleus.
Question 12. Which among the following has specialized tissue for conduction of water?
(1) Thallophyta
(2) Bryophyta
(3) Pteridophyta
(4) Gymnosperms
- (1) and (2)
- (2) and (3)
- (3) and (4)
- (1) and (4)
Answer. 3. (3) and (4)
Question 13. Which among the following produce seeds?
- Thallophyta
- Bryophyta
- Pteridophyta
- Gymnosperms
Answer. 4. Gymnosperms
Question 14. Which one of the following is a true fish?
- Jellyfish
- Starfish
- Dogfish
- Silverfish
Answer. 3. Dogfish
Question 15. Which among the following is exclusively marine?
- Porifera
- Echinodermata
- Mollusca
- Pisces
Answer. 2. Echinodermata
Question 16. Which among the following have open circulatory system?
(1) Arthropoda
(2) Mollusca
(3) Annelida
(4) Coelenterata
- (1) and (2)
- (3) and (4)
- (1) and (3)
- (2) and (4)
Answer. 1. (1) and (2)
Question 17. In which group of animals, coelom is filled with blood?
- Arthropoda
- Annelida
- Nematoda
- Echinodermata
Answer. 1. Arthropoda
Question 18. Elephantiasis is caused by
- Wuchereria
- Pinworm
- Planarians
- Liver flukes
Answer. 1. Wuchereria
Question 19. Which one is the most striking or common character of the vertebrates?
- Presence of notochord
- Presence of triploblastic condition
- Presence of gill pouches
- Presence of coelom
Answer. 1. Presence of notochord
Question 20. Which among the following have scales?
(1) Amphibians
(2) Pisces
(3) Reptiles
(4) Mammals
- (1) and (3)
- (3) and (4)
- (2) and (3)
- (1) and (2)
Answer. 3. (2) and (3)
Question 21. Find out the false statement from the following.
- Aves are warm-blooded, egg-laying, and have four-chambered hearts.
- Aves have a feather-covered body, forelimbs are modified as wing and breathe through lungs.
- Most of the mammals are viviparous.
- Fishes, amphibians and reptiles are oviparous.
Answer. 4. Fishes, amphibians and reptiles are oviparous.
Question 22. Pteridophyta do not have
- Root
- Stem
- Flowers
- Leaves
Answer. 3. Flowers
Question 23. Identify a member of Porifera from the following.
- Spongilla
- Euglena
- Penicillium
- Hydra
Answer. 1. Spongilla
Question 24. Which of the following is not an aquatic animal?
- Hydra
- Jelly fish
- Corals
- Filaria
Answer. 4. Filaria
Question 25. Amphibians do not have which of the following?
- Three-chambered heart
- Gills or lungs
- Scales
- Mucus glands
Answer. 3. Scales
Question 26. Organisms without nucleus and cell organelles belong to
(1) Fungi
(2) Protista
(3) Cyanobacteria
(4) Archaebacteria
- (1) and (2)
- (3) and (4)
- (1) and (4)
- (2) and (3)
Answer. 2. (3) and (4)
Question 27. Which of the following is not a criterion for the classification of living organisms?
- Body design of the organism.
- Ability to produce one’s own food.
- Membrane-bound nucleus and cell organelles.
- Height of the plant.
Answer. 4. Height of the plant.
Question 28. Which of the following features is not a characteristic of Protochordata?
- Presence of notochord.
- Bilateral symmetry and coelom.
- Jointed legs.
- Presence of circulatory system.
Answer. 3. Jointed legs.
Question 29. Which of the following are locomotory organs of Echinodermata?
- Tube feet
- Muscular feet
- Jointed legs
- Parapodia
Answer. 1. Tube feet
Question 30. Corals are
- Poriferans attached to some solid support.
- Cnidarians are solitary living.
- Poriferans are present at the sea bed.
- Cnidarians that live in colonies.
Answer. 4. Cnidarians that live in colonies.
Question 31. Who introduced the system of scientific nomenclature of organisms?
- Robert Whittaker
- Carolus Linnaeus
- Robert Hooke
- Ernst Haeckel
Answer. 2. Carolus Linnaeus
Question 32. Two-chambered heart occurs in which of the following animals?
- Crocodiles
- Fish
- Aves
- Amphibians
Answer. 2. Fish
Question 33. The skeleton is made entirely of cartilage in which of the following animals?
- Sharks
- Tuna
- Rohu
- None of these
Answer. 1. Sharks
Question 34. Which one of the following is not an annelid?
- Nereis
- Earthworm
- Leech
- Urchins
Answer. 4. Urchins
Question 35. The book Systema Naturae was written by
- Linnaeus
- Haeckel
- Whittaker
- Robert Brown
Answer. 1. Linnaeus
Question 36. Carl von Linnaeus was involved with which branch of science?
- Morphology
- Taxonomy
- Physiology
- Medicine
Answer. 2. Taxonomy
Question 37. Real organs are absent in which of the following?
- Mollusca
- Coelenterata
- Arthropoda
- Echinodermata
Answer. 2. Coelenterata
Question 38. Hard calcium carbonate structures are used as skeletons by which of the following?
- Echinodermata
- Protochordate
- Arthropoda
- Nematoda
Answer. 1. Echinodermata
Question 39. Differentiation in segmental fashion occurs in which of the following?
- Leech
- Starfish
- Snails
- Ascaris
Answer. 1. Leech
Question 40. In a taxonomic hierarchy, family comes between which of the following?
- Class and Order
- Order and Genus
- Genus and Species
- Division and Class
Answer. 2. Order and Genus
Question 41. The five-kingdom classification was given by
- Morgan
- R. Whittaker
- Linnaeus
- Haeckel
Answer. 2. R. Whittaker
Question 42. A well-defined nucleus is absent in
- blue-green algae
- diatoms
- algae
- yeast
Answer. 1. blue-green algae
Question 43. The book ‘Origin of Species’ was written by
- Linnaeus
- Darwin
- Hackel
- Whittaker
Answer. 2. Darwin
NEET Biology Chapter 5 Natural Resources Question And Answers
NEET Biology Chapter 5 Natural Resources Question And Answers
Question 1. What is the major source of fresh water in the city/town/village where you live?
Answer:
The major sources of water are as follows.
- Water in the form of snow, ice-covered mountains.
- Underground water well.
- Surface water like in lakes, rivers, ponds.
- Rainfall.
- Stored rain water in tanks, dams.
Question 2. Do you know of any activity which may be polluting this water source?
Answer: Yes, the water is polluted by (a) sewage (b) dumping waste in river, (c) factory waste, etc.
Question 3. Why do organisms need water?
Answer:
Organisms need water for the following activities.
- All cellular processes occur due to water.
- Transportation of substances in our body takes place by dissolving in water.
- Terrestrial animals require fresh water for transportation of minerals and for getting rid of waste from their body.
- Plants require water for photosynthesis.
Question 4. Why is water essential for life?
Answer:
- About 70% weight of human being is due to water.
- All cellular processes takes place in water as medium.
- All reactions takes place within our body and within the cells occur between substances that are dissolved in water.
- Tansportation of substances from one form to another takes place due to water.
- Terrestrial life forms require fresh water for the transportation of substances and to get rid of high amounts of wastes.
Question 5. What is the greenhouse effect?
Answer:
Greenhouse effect
Gases like CO2 and methane trap sun’s radiation and don’t allow it to go back. This causes warming of atmosphere. This effect is called greenhouse effect.
Question 6. What are suspended particulate matter?
Answer:
Suspended particulate matter
The particulate pollutants of the air are also known as suspended particulate matter or SPM, which consists of soot (black powdered substance produced on burning of coal, wood, etc.), smoke, fly ash and dust.
Question 7. Name the three types of air pollution.
Answer:
Three types of air pollution
The three types of water pollution are surface water or inland, underground water and marine water pollution.
Question 8. What do you understand by the term bioaccumulation?
Answer:
Bioaccumulation
It is used for storage of pollutants in the body tissues of humans and animals (fats, kidney, bone, etc.) at a higher concentration than found in the environment.
Question 9. What is soil erosion?
Answer:
Soil erosion
The removal of top soil by air and wind water is called soil erosion.
Question 10. What are the methods of preventing or reducing soil erosion?
Answer:
The methods to reduce soil erosion are as follows
- Soil should have some vegetations like grass growing on it, so that it does not get carried away by rain water or wind.
- Afforestation or planting of trees, so that roots hold the soil and prevent soil erosion.
Question 11. Discuss the various sources of soil pollution.
Answer:
Various sources of soil pollution
- Pulp and paper mills.
- Sugar mills
- Oil refineries and power plants.
- Domestic wastes (food scraps, cans, rags, ash, broken gadgets, etc.).
Question 12. What do you understand by soil profile?
Answer:
Soil profile
It represents the vertical section of the crust of the earth. It comprises of subsequent horizontal layers known as horizons. These horizons can be distinguished on the basis of colour, texture, thickness, structure, porosity, acidity, consistency and composition.
Question 13. What is weathering?
Answer:
Weathering
The process of breakdown of huge rocks into smaller particles is known as weathering.
Question 14. What is paedogenesis?
Answer:
Paedogenesis
This process results in the humification and mineralization due to breakdown of organic matter because of the decomposition of microorganisms such as bacteria and fungi.
Question 15. What is biological weathering?
Answer:
Biological weathering
The breakdown of complex substances by living organisms, such as lichens and bryophytes is termed as biological weathering.
Question 16. What is the ozone layer?
Answer:
Ozone layer
The part of the atmosphere rich in ozone concentration is known as the ozone layer, ozonosphere or ozone shield.
Question 17. What do you understand by the term biogeochemical?
Answer:
Biogeochemical
The term ‘biogeochemical’ is described as the uptake of nutrient elements from the surface of the earth by living organisms to perform vital functions such as growth and metabolism.
Question 18. What are greenhouse gases?
Answer:
Greenhouse gases
Greenhouse gases include carbon dioxide, nitrogen dioxide, ozone and chlorofluorocarbons.
Question 19. What is the global water cycle?
Answer:
Global water cycle
Water from water bodies evaporates to form clouds which are blown over the land through winds. The collected water gets evaporated again from the reservoirs or ground to form through evaporation. The repeated cycle completes the global water cycle.
Question 20. What is nitrogen fixation?
Answer:
Nitrogen fixation
The process of conversion is carried out either by industrial nitrogen fixation or nitrogen-fixing bacteria like Azotobacter and Rhizobium. These organisms convert atmospheric nitrogen into nitrates, which is the water-soluble form of nitrogen. This process of fixation is termed as nitrogen fixation.
NEET Biology Chapter 6 Improvement In Food Resources Question And Answers
NEET Biology Chapter 6 Improvement In Food Resources Question And Answers
Question 1. What do we get from cereals, pulses, fruits, and vegetables?
Answer: Cereals give carbohydrates which provide energy. Pulses give proteins that build our body. Vegetables and fruits provide vitamins and minerals.
Question 2. Before cultivating a crop variety, a farmer goes through several steps. Discuss the steps.
Answer: The first step is the choice of seeds for planting. The second is the nurturing of the crop plants and the third is the protection of the growing and harvested crops from loss.
Question 3. Discuss the three methods that how crop yield can be improved.
Answer:
For improving crop yields from such deterioration, three methods can be applied:
- Crop variety improvement through genetic manipulation.
- Crop production management.
- Crop protection management.
Question 4. What is green revolution and who is the ‘Father of Green Revolution’?
Answer:
Green revolution
Green Revolution deals with the high production of food grains. Dr. Swaminathan is known as the ‘Father of Green Revolution’.
Question 5. Discuss the characteristics and features of Kharif and Rabi crops.
Answer:
NEET Chemistry Chapter 3 Atoms And Molecules Question And Answers
NEET Chemistry Chapter 3 Atoms And Molecules Question And Answers
Question 1. Name two elements which exists independently.
Answer.
Helium and neon are two elements which exists independently.
Question 2. Define an atom.
Answer.
Atom:
An atom is the smallest unit of matter which has the chemical properties of the element.
Question 3. What is atomic mass?
Answer.
Atomic Mass:
The amount of the total number of protons and neutrons present in the nucleus of an atom is called atomic mass.
Question 4. Define valency.
Answer.
Valency:
Valency is a tendency in an atom to achieve the state of stability by achieving 8 electrons in its outermost shell by receiving, leaving or sharing of electrons from other atoms.
Question 5. What are homonuclear molecules?
Answer.
Homonuclear molecules:
Homonuclear molecules are those molecules in which same type of atoms are present.
Example H2, Cl2 etc.
Question 6. What are heteronuclear molecules?
Answer.
Heteronuclear Molecules:
Heteronuclear molecules are those molecules in which different type of atoms are present.
Example, H2O, CO2 etc.
Question 7. What are polyatomic ions?
Answer.
Polyatomic ions:
A group of atoms that carry a charge is called polyatomic ion. Example NH4+, CO32- etc.
Question 8. Why were the rehabilitation centres and health spas made in forest areas?
Answer.
The forests besides giving fresh and unpolluted air, also naturally provide negative ions which neutralises the harmful effects of positive ions.
Question 9. What does a chemical formula tell us about?
Answer.
Chemical formula:
A chemical formula tells us about the elements present in a compound along with their number.
Question 10. State the chemical formula of the compound formed between Hydrogen and Sulphur.
Answer.
Chemical formula of the compound formed between Hydrogen and Sulphur:
Valency of Hydrogen = 1
Valency of Sulphur = 2
Compound of Hydrogen and Sulphur = H2S
Question 11. An element ‘A’ forms a compound A2O3. What according to you is the valency of A?
Answer.
An element ‘A’ forms a compound A2O3.
The valency of A will be 3.
Question 12. An element has a valency of 2. What will be the formula for its oxide?
Answer.
An element has a valency of 2.
Valency of the element (X) = 2
Valency of Oxygen = 2
Formula for its oxide = XO
NEET Physics Chapter 4 Structure Of Atom Question And Answers
NEET Physics Chapter 4 Structure Of Atom Question And Answers
Question 1. Define atomic number.
Answer.
Atomic Number:
The atomic number is the number of protons in an atom of an element.
Question 2. Define atomic mass.
Answer.
Atomic Mass:
The atomic weight measures the total number of particles present in an atom’s nucleus. The nucleus is made up of protons and neutrons. So,
Mass number = (Number of Protons) + (Number of Neutrons)
Question 3. What are canal rays?
Answer.
Canal Rays:
These positively charged radiations are produced in discharge tubes from the anode called canal rays.
Question 4. What is the relative mass of a neutron?
Answer.
Relative mass of neutron:
A neutron is 1842 times heavier than an electron.
Question 5. Define nucleon.
Answer.
Nucleon:
A nucleon is a sub-atomic particle found in the nucleus of an atom.
Question 6. What are the limitations of Thomson’s plum pudding model?
Answer.
The limitations of Thomson’s plum pudding model:
- Thomson’s plum pudding model: could not explain the result of the scattering experiment performed by Rutherford.
- Thomson’s plum pudding model: did not give any experimental evidence in its support.
Question 7. What are the observations of Rutherford’s model?
Answer.
Observations of Rutherford’s Model were:
- Most of the alpha particles pass through the foil without getting deflected, which means that most of the space inside the atom is empty.
- Some of the alpha particles were deflected by a small angle, which means that the positive charge ofthe atom occupies very little space.
- Some of the alpha particles rebound back, which means the entire positive charge and mass of the atom are concentrated in a very small volume inside an atom.
Question 8. What are the limitations of the Rutherford model?
Answer.
The limitations of Rutherford’s model were:
- Rutherford proposed that the electrons revolve around the nucleus in fixed paths called orbits. But according to Maxwell, an accelerated charged particle such as an electron always emits electromagnetic radiation and this radiation would carry energy from the motion of the electron which would come at the cost of shrinking of orbits. So, the electrons would collapse in the nucleus.
- Rutherford did not say anything about the arrangement of electrons in an atom.
Question 9. Define electronic configuration.
Answer.
Electronic configuration:
The electronic configuration is an arrangement of electrons in various shells of an atom of the element.
Question 10. Explain the symbol 16O8.
Answer.
Symbol 16O8
It shows that oxygen has a mass number of 16 and an atomic number is 8.
Question 11. Draw the electron dot structure of Chlorine (atomic number 17).
Answer.
The electron dot structure of Chlorine (atomic number 17):
Chlorine (Cl) –2, 8, 7
Question 12. How can an atom obtain a stable configuration?
Answer.
Atom can obtain a stable configuration, either by:
- Losing an electron
- Gaining an electron
- Sharing an electron
Question 13. What are valence electrons?
Answer.
Valence electrons:
Valence electrons are the electrons present in the outermost orbit of an atom, thus determining the valency of an atom.
Question 14. Why does Magnesium ion exist as Mg2+?
Answer.
Magnesium ion exists as Mg2+.
Magnesium molecule has an electronic configuration 2,8,2. It has two electrons in its outermost orbit, so it requires six more electrons to complete its outermost orbit (M-shell). So, it will either donate its two electrons to another atom or share electrons from another atom just to complete its octet. Master your Test
Question 15. What approximation is taken while calculating the number of neutrons?
Answer.
Protons and neutrons have approximately the same mass and the mass defect of nucleon binding is small as compared to the nucleon mass, the atomic mass of any atom. This approximation of mass is used to calculate the number of neutrons in an element.
Question 16. The atomic number of calcium is 20. Calculate the number of electrons and protons in calcium.
Answer.
Given
An atomic number of calcium is 20.
Since, Atomic number = Number of protons = Number of electrons So, the number of electrons in calcium is = the 20Number of protons in calcium = 20
Question 17. The atomic mass of aluminum is 27 u and the atomic number is 13, find the number of protons and neutrons in aluminum.
Answer.
Given
The atomic mass of aluminium is 27 u and the atomic number is 13
Atomic number = 13
So, the number of protons = 13
Atomic mass (Mass number) = Number of protons + Number of neutrons
Let the number of neutrons be ‘n’
27 u = 13 + n
n = 27 − 13 = 14
So, number of proton = 13 and number of neutron = 14
Question 18. Define isotopes.
Answer.
Isotopes:
Isotopes are the atoms having same number of protons, but different numbers of neutrons, i.e., they have different atomic weights.
Question 19. List 3 applications of isotopes.
Answer.
Applications are:
- The identification of primary and secondary food sources.
- Tracing nutrient and mineral uptake by plants and animals.
- Determining the relative importance of plants and microbes to greenhouse gas emissions from soil.
Question 20. Why do radioactive elements have unstable nuclei?
Answer.
It has an unstable combination of protons and neutrons, and that is why they have an unstable nucleus.