Q. Which of the following phenomena is NOT associated with waves? (2023)
A.
Interference
B.
Diffraction
C.
Refraction
D.
Conduction
Show solution
Solution
Conduction is a mode of heat transfer and is not associated with wave phenomena.
Correct Answer: D — Conduction
Learn More →
Q. Which of the following phenomena is responsible for the bending of light when it passes from one medium to another? (2020)
A.
Reflection
B.
Refraction
C.
Diffraction
D.
Dispersion
Show solution
Solution
Refraction is the bending of light as it passes from one medium to another due to a change in its speed.
Correct Answer: B — Refraction
Learn More →
Q. Which of the following phenomena is responsible for the blue color of the sky? (2022)
A.
Reflection
B.
Refraction
C.
Diffraction
D.
Rayleigh scattering
Show solution
Solution
The blue color of the sky is primarily due to Rayleigh scattering, which scatters shorter wavelengths of light more than longer wavelengths.
Correct Answer: D — Rayleigh scattering
Learn More →
Q. Which of the following plant groups is known for having a life cycle that includes both gametophyte and sporophyte generations? (2021)
A.
Angiosperms
B.
Gymnosperms
C.
Pteridophytes
D.
All of the above
Show solution
Solution
Pteridophytes, like ferns, exhibit an alternation of generations with both gametophyte and sporophyte stages.
Correct Answer: C — Pteridophytes
Learn More →
Q. Which of the following plant groups is known for having a life cycle that includes alternation of generations? (2022)
A.
Angiosperms
B.
Gymnosperms
C.
Pteridophytes
D.
All of the above
Show solution
Solution
All of the mentioned groups (Angiosperms, Gymnosperms, and Pteridophytes) exhibit alternation of generations in their life cycles.
Correct Answer: D — All of the above
Learn More →
Q. Which of the following polymers is used in the making of rubber? (2019)
A.
Polyethylene
B.
Natural rubber
C.
Polystyrene
D.
Polyvinyl acetate
Show solution
Solution
Natural rubber is a polymer made from the latex of rubber trees and is widely used in the production of rubber products.
Correct Answer: B — Natural rubber
Learn More →
Q. Which of the following polymers is used in the manufacture of rubber? (2019)
A.
Polyethylene
B.
Natural rubber
C.
Polystyrene
D.
Polyvinyl acetate
Show solution
Solution
Natural rubber is a polymer made from the latex of rubber trees and is widely used in the manufacture of rubber products.
Correct Answer: B — Natural rubber
Learn More →
Q. Which of the following polymers is used in the production of rubber? (2019)
A.
Polyethylene
B.
Natural rubber
C.
Polystyrene
D.
Polyvinyl acetate
Show solution
Solution
Natural rubber is a polymer made from the latex of rubber trees and is widely used in the production of rubber products.
Correct Answer: B — Natural rubber
Learn More →
Q. Which of the following practices can help conserve biodiversity? (2021)
A.
Deforestation
B.
Overfishing
C.
Sustainable tourism
D.
Pollution
Show solution
Solution
Sustainable tourism can help conserve biodiversity by promoting responsible travel that does not harm ecosystems.
Correct Answer: C — Sustainable tourism
Learn More →
Q. Which of the following practices can help in conserving biodiversity? (2021)
A.
Monoculture farming
B.
Deforestation
C.
Sustainable agriculture
D.
Urbanization
Show solution
Solution
Sustainable agriculture practices help in conserving biodiversity by maintaining healthy ecosystems.
Correct Answer: C — Sustainable agriculture
Learn More →
Q. Which of the following practices can help reduce soil erosion? (2022)
A.
Overgrazing
B.
Crop rotation
C.
Deforestation
D.
Urbanization
Show solution
Solution
Crop rotation helps maintain soil health and reduces soil erosion by preventing nutrient depletion.
Correct Answer: B — Crop rotation
Learn More →
Q. Which of the following processes can lead to speciation? (1990)
A.
Geographic isolation
B.
Behavioral isolation
C.
Temporal isolation
D.
All of the above
Show solution
Solution
Speciation can occur through various processes, including geographic, behavioral, and temporal isolation, leading to the formation of new species.
Correct Answer: D — All of the above
Learn More →
Q. Which of the following processes increases the entropy of the system? (2022)
A.
Freezing of water
B.
Melting of ice
C.
Condensation of steam
D.
Compression of gas
Show solution
Solution
The melting of ice increases the entropy of the system as it transitions from a solid to a liquid state, which has more disorder.
Correct Answer: B — Melting of ice
Learn More →
Q. Which of the following processes involves a change of state without a change in temperature? (2018)
A.
Heating
B.
Cooling
C.
Melting
D.
Boiling
Show solution
Solution
Melting involves a change of state (solid to liquid) without a change in temperature.
Correct Answer: C — Melting
Learn More →
Q. Which of the following processes involves the conversion of mRNA into a protein? (2022)
A.
Transcription
B.
Translation
C.
Replication
D.
Translocation
Show solution
Solution
Translation is the process where mRNA is decoded to produce a protein.
Correct Answer: B — Translation
Learn More →
Q. Which of the following processes involves the emission of a positron? (2019)
A.
Alpha decay
B.
Beta decay
C.
Gamma decay
D.
Neutron capture
Show solution
Solution
Beta decay involves the emission of a positron, which is the antimatter counterpart of an electron.
Correct Answer: B — Beta decay
Learn More →
Q. Which of the following processes involves the synthesis of proteins? (2022)
A.
Replication
B.
Transcription
C.
Translation
D.
Translocation
Show solution
Solution
Translation is the process that involves the synthesis of proteins from mRNA.
Correct Answer: C — Translation
Learn More →
Q. Which of the following processes involves the transfer of genetic material between bacteria? (2022)
A.
Transcription
B.
Translation
C.
Transformation
D.
Transduction
Show solution
Solution
Transformation is the process by which bacteria take up foreign DNA from their environment.
Correct Answer: C — Transformation
Learn More →
Q. Which of the following processes involves the transfer of heat through a fluid? (2021)
A.
Conduction
B.
Convection
C.
Radiation
D.
Insulation
Show solution
Solution
Convection is the process that involves the transfer of heat through a fluid (liquid or gas) due to the movement of the fluid itself.
Correct Answer: B — Convection
Learn More →
Q. Which of the following processes involves the transfer of heat through the movement of fluids? (2021)
A.
Conduction
B.
Convection
C.
Radiation
D.
Insulation
Show solution
Solution
Convection involves the transfer of heat through the movement of fluids.
Correct Answer: B — Convection
Learn More →
Q. Which of the following processes is directly influenced by auxins? (2021)
A.
Phototropism
B.
Photosynthesis
C.
Respiration
D.
Transpiration
Show solution
Solution
Auxins are responsible for phototropism, the growth of plants towards light.
Correct Answer: A — Phototropism
Learn More →
Q. Which of the following processes is influenced by auxins? (2021)
A.
Phototropism
B.
Gravitropism
C.
Apical dominance
D.
All of the above
Show solution
Solution
Auxins influence various processes including phototropism, gravitropism, and apical dominance.
Correct Answer: D — All of the above
Learn More →
Q. Which of the following processes is NOT directly influenced by auxins? (2021)
A.
Phototropism
B.
Gravitropism
C.
Apical dominance
D.
Photosynthesis
Show solution
Solution
Photosynthesis is not directly influenced by auxins; they mainly affect growth and development processes.
Correct Answer: D — Photosynthesis
Learn More →
Q. Which of the following processes is NOT influenced by auxins? (2021)
A.
Phototropism
B.
Gravitropism
C.
Apical dominance
D.
Fruit ripening
Show solution
Solution
Fruit ripening is primarily influenced by ethylene, not auxins.
Correct Answer: D — Fruit ripening
Learn More →
Q. Which of the following processes is NOT influenced by plant hormones? (2021)
A.
Seed germination
B.
Fruit ripening
C.
Photosynthesis
D.
Flowering
Show solution
Solution
Photosynthesis is a biochemical process that is not directly influenced by plant hormones.
Correct Answer: C — Photosynthesis
Learn More →
Q. Which of the following processes is primarily regulated by auxins? (2021)
A.
Phototropism
B.
Photosynthesis
C.
Respiration
D.
Transpiration
Show solution
Solution
Auxins are primarily responsible for phototropism, the growth of plants towards light.
Correct Answer: A — Phototropism
Learn More →
Q. Which of the following processes occurs during aerobic respiration in plants? (2020)
A.
Fermentation
B.
Glycolysis
C.
Anaerobic respiration
D.
Photosynthesis
Show solution
Solution
Glycolysis is the first step in aerobic respiration, where glucose is broken down to produce energy.
Correct Answer: B — Glycolysis
Learn More →
Q. Which of the following processes occurs during expiration? (2023)
A.
Diaphragm contracts
B.
Intercostal muscles relax
C.
Lungs expand
D.
Air is drawn in
Show solution
Solution
During expiration, the diaphragm relaxes and the intercostal muscles also relax, leading to a decrease in thoracic volume and expulsion of air from the lungs.
Correct Answer: B — Intercostal muscles relax
Learn More →
Q. Which of the following processes occurs during the light-dependent reactions of photosynthesis? (2020)
A.
Calvin cycle
B.
Photolysis of water
C.
Carbon fixation
D.
Synthesis of glucose
Show solution
Solution
Photolysis of water occurs during the light-dependent reactions, producing oxygen and electrons.
Correct Answer: B — Photolysis of water
Learn More →
Q. Which of the following processes occurs in the thylakoid membranes of chloroplasts? (2020)
A.
Calvin cycle
B.
Light-dependent reactions
C.
Light-independent reactions
D.
Photorespiration
Show solution
Solution
The light-dependent reactions of photosynthesis occur in the thylakoid membranes.
Correct Answer: B — Light-dependent reactions
Learn More →
Showing 2521 to 2550 of 2832 (95 Pages)