Q. Which of the following muscles is responsible for the flexion of the forearm? (2019)
-
A.
Biceps brachii
-
B.
Triceps brachii
-
C.
Deltoid
-
D.
Pectoralis major
Solution
The biceps brachii muscle is primarily responsible for flexing the forearm at the elbow.
Correct Answer: A — Biceps brachii
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Q. Which of the following mutations does NOT change the amino acid sequence of a protein? (2022)
-
A.
Missense mutation
-
B.
Nonsense mutation
-
C.
Silent mutation
-
D.
Frameshift mutation
Solution
A silent mutation does not change the amino acid sequence of a protein despite a change in the DNA sequence.
Correct Answer: C — Silent mutation
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Q. Which of the following organelles contains chlorophyll? (2022)
-
A.
Mitochondria
-
B.
Chloroplast
-
C.
Nucleus
-
D.
Golgi apparatus
Solution
Chloroplasts contain chlorophyll, which is essential for photosynthesis in plant cells.
Correct Answer: B — Chloroplast
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Q. Which of the following organelles contains digestive enzymes? (2023)
-
A.
Peroxisome
-
B.
Lysosome
-
C.
Ribosome
-
D.
Vesicle
Solution
Lysosomes contain digestive enzymes that break down waste materials and cellular debris.
Correct Answer: B — Lysosome
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Q. Which of the following organelles is involved in photosynthesis? (2022)
-
A.
Mitochondria
-
B.
Chloroplast
-
C.
Ribosome
-
D.
Golgi apparatus
Solution
Chloroplasts are the organelles responsible for photosynthesis in plant cells, converting light energy into chemical energy.
Correct Answer: B — Chloroplast
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Q. Which of the following organisms can reproduce both sexually and asexually? (2023)
-
A.
Fungi
-
B.
Starfish
-
C.
Hydra
-
D.
All of the above
Solution
Many organisms, including fungi, starfish, and Hydra, can reproduce both sexually and asexually depending on environmental conditions.
Correct Answer: D — All of the above
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Q. Which of the following organisms is an example of a cnidarian? (2021)
-
A.
Jellyfish
-
B.
Earthworm
-
C.
Lobster
-
D.
Starfish
Solution
Jellyfish belong to the phylum Cnidaria, which is known for its stinging cells called cnidocytes.
Correct Answer: A — Jellyfish
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Q. Which of the following organisms is classified as a prokaryote? (2019)
-
A.
Yeast
-
B.
E. coli
-
C.
Mushroom
-
D.
Paramecium
Solution
E. coli is a prokaryotic organism, while the others are eukaryotic.
Correct Answer: B — E. coli
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Q. Which of the following organisms is classified under the kingdom Protista? (2022)
-
A.
Mushrooms
-
B.
Euglena
-
C.
Lichens
-
D.
Corals
Solution
Euglena is classified under the kingdom Protista, which includes diverse unicellular organisms.
Correct Answer: B — Euglena
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Q. Which of the following organisms is known for its ability to reproduce both sexually and asexually? (2021)
-
A.
Yeast
-
B.
Mammals
-
C.
Birds
-
D.
Reptiles
Solution
Yeast can reproduce both sexually through spores and asexually through budding.
Correct Answer: A — Yeast
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Q. Which of the following organisms is known for regeneration as a form of asexual reproduction? (2021)
-
A.
Starfish
-
B.
Elephant
-
C.
Bird
-
D.
Cat
Solution
Starfish can regenerate lost arms, which is a form of asexual reproduction.
Correct Answer: A — Starfish
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Q. Which of the following organisms reproduces asexually by budding? (2021)
-
A.
Hydra
-
B.
Frog
-
C.
Human
-
D.
Mango tree
Solution
Hydra reproduces asexually by the process of budding, where a new individual develops from an outgrowth of the parent.
Correct Answer: A — Hydra
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Q. Which of the following organisms reproduces by budding? (2023)
-
A.
Planaria
-
B.
Hydra
-
C.
Bacteria
-
D.
Fungi
Solution
Budding is a form of asexual reproduction seen in organisms like Hydra, where a new individual develops from an outgrowth.
Correct Answer: B — Hydra
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Q. Which of the following organisms reproduces by fragmentation? (2022)
-
A.
Starfish
-
B.
Mammals
-
C.
Birds
-
D.
Fungi
Solution
Starfish can reproduce by fragmentation, where a part of the organism can grow into a new individual.
Correct Answer: A — Starfish
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Q. Which of the following organisms reproduces by parthenogenesis? (2022)
-
A.
Honeybee
-
B.
Frog
-
C.
Lizard
-
D.
Human
Solution
Honeybees can reproduce by parthenogenesis, where an egg develops into an organism without fertilization.
Correct Answer: A — Honeybee
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Q. Which of the following organisms reproduces sexually? (2023)
-
A.
Bacteria
-
B.
Fungi
-
C.
Mammals
-
D.
All of the above
Solution
Mammals reproduce sexually, while bacteria typically reproduce asexually, and fungi can reproduce both sexually and asexually.
Correct Answer: C — Mammals
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Q. Which of the following organisms reproduces through parthenogenesis? (2020)
-
A.
Honeybee
-
B.
Frog
-
C.
Human
-
D.
Goldfish
Solution
Honeybees can reproduce through parthenogenesis, where unfertilized eggs develop into new individuals.
Correct Answer: A — Honeybee
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Q. Which of the following oxides is amphoteric? (2019)
-
A.
Na2O
-
B.
MgO
-
C.
Al2O3
-
D.
SiO2
Solution
Al2O3 is an amphoteric oxide, reacting with both acids and bases.
Correct Answer: C — Al2O3
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Q. Which of the following phenomena is NOT associated with waves? (2023)
-
A.
Interference
-
B.
Diffraction
-
C.
Refraction
-
D.
Conduction
Solution
Conduction is a mode of heat transfer and is not associated with wave phenomena.
Correct Answer: D — Conduction
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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
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
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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
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
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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
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
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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
Solution
Pteridophytes, like ferns, exhibit an alternation of generations with both gametophyte and sporophyte stages.
Correct Answer: C — Pteridophytes
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Q. Which of the following polymers is used in the making of rubber? (2019)
-
A.
Polyethylene
-
B.
Natural rubber
-
C.
Polystyrene
-
D.
Polyvinyl acetate
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
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Q. Which of the following polymers is used in the manufacture of rubber? (2019)
-
A.
Polyethylene
-
B.
Natural rubber
-
C.
Polystyrene
-
D.
Polyvinyl acetate
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
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Q. Which of the following polymers is used in the production of rubber? (2019)
-
A.
Polyethylene
-
B.
Natural rubber
-
C.
Polystyrene
-
D.
Polyvinyl acetate
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
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Q. Which of the following practices can help conserve biodiversity? (2021)
-
A.
Deforestation
-
B.
Overfishing
-
C.
Sustainable tourism
-
D.
Pollution
Solution
Sustainable tourism can help conserve biodiversity by promoting responsible travel that does not harm ecosystems.
Correct Answer: C — Sustainable tourism
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Q. Which of the following practices can help in conserving biodiversity? (2021)
-
A.
Monoculture farming
-
B.
Deforestation
-
C.
Sustainable agriculture
-
D.
Urbanization
Solution
Sustainable agriculture practices help in conserving biodiversity by maintaining healthy ecosystems.
Correct Answer: C — Sustainable agriculture
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Q. Which of the following practices can help reduce soil erosion? (2022)
-
A.
Overgrazing
-
B.
Crop rotation
-
C.
Deforestation
-
D.
Urbanization
Solution
Crop rotation helps maintain soil health and reduces soil erosion by preventing nutrient depletion.
Correct Answer: B — Crop rotation
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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
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
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