Q. Which of the following materials is considered a ferromagnetic material? (2021)
-
A.
Copper
-
B.
Aluminum
-
C.
Iron
-
D.
Gold
Solution
Iron is a ferromagnetic material, which means it can be magnetized and retains its magnetic properties.
Correct Answer: C — Iron
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Q. Which of the following materials is considered a good conductor of electricity? (2022)
-
A.
Rubber
-
B.
Copper
-
C.
Wood
-
D.
Glass
Solution
Copper is a good conductor of electricity due to its low resistance and high conductivity.
Correct Answer: B — Copper
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Q. Which of the following metals has the highest standard reduction potential? (2019)
-
A.
Gold
-
B.
Silver
-
C.
Copper
-
D.
Zinc
Solution
Gold has the highest standard reduction potential among the given metals.
Correct Answer: A — Gold
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Q. Which of the following methods is considered a permanent form of contraception? (2022)
-
A.
IUD
-
B.
Vasectomy
-
C.
Condoms
-
D.
Birth control pills
Solution
Vasectomy is a surgical procedure that provides a permanent form of contraception for males.
Correct Answer: B — Vasectomy
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Q. Which of the following microbes is commonly used in the fermentation of food? (2021)
-
A.
Bacteria
-
B.
Viruses
-
C.
Fungi
-
D.
All of the above
Solution
All of the mentioned microbes can be involved in fermentation processes, but bacteria and fungi are the most common.
Correct Answer: D — All of the above
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Q. Which of the following microbes is commonly used in the fermentation of yogurt? (2021)
-
A.
Lactobacillus
-
B.
Escherichia coli
-
C.
Staphylococcus
-
D.
Bacillus subtilis
Solution
Lactobacillus is the primary bacterium used in the fermentation process to produce yogurt.
Correct Answer: A — Lactobacillus
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Q. Which of the following microbes is used in the production of antibiotics? (2020)
-
A.
Bacteria
-
B.
Viruses
-
C.
Fungi
-
D.
Protozoa
Solution
Fungi, particularly the genus Penicillium, are used in the production of antibiotics like penicillin.
Correct Answer: C — Fungi
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Q. Which of the following microbes is used in the production of biofertilizers? (2022)
-
A.
Rhizobium
-
B.
Streptococcus
-
C.
Clostridium
-
D.
Bacillus cereus
Solution
Rhizobium is a bacterium that forms symbiotic relationships with legumes and is used in biofertilizers for nitrogen fixation.
Correct Answer: A — Rhizobium
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Q. Which of the following microbes is used in the production of biofuels? (2023)
-
A.
Bacteria
-
B.
Viruses
-
C.
Fungi
-
D.
All of the above
Solution
Bacteria are commonly used in the production of biofuels through fermentation processes.
Correct Answer: A — Bacteria
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Q. Which of the following microbes is used in the production of insulin? (2023)
-
A.
Bacteria
-
B.
Viruses
-
C.
Fungi
-
D.
Algae
Solution
Genetically modified bacteria are used in the production of insulin for diabetes treatment.
Correct Answer: A — Bacteria
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Q. Which of the following microbes is used in the production of yogurt? (2021)
-
A.
Lactobacillus
-
B.
Escherichia coli
-
C.
Staphylococcus
-
D.
Bacillus subtilis
Solution
Lactobacillus is the primary bacterium used in the fermentation of milk to produce yogurt.
Correct Answer: A — Lactobacillus
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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 its ability to reproduce through fragmentation? (2021)
-
A.
Starfish
-
B.
Elephant
-
C.
Bird
-
D.
Human
Solution
Starfish can reproduce through fragmentation, where a part of the organism can regenerate into a new individual.
Correct Answer: A — Starfish
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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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