Q. Which organelle is responsible for producing ATP?
-
A.
Nucleus
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B.
Ribosome
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C.
Mitochondria
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D.
Endoplasmic Reticulum
Solution
Mitochondria are known as the powerhouse of the cell, where ATP is produced through cellular respiration.
Correct Answer: C — Mitochondria
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Q. Which part of the brain is responsible for regulating heart rate and breathing?
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A.
Cerebrum
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B.
Cerebellum
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C.
Medulla oblongata
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D.
Thalamus
Solution
The medulla oblongata controls autonomic functions such as heart rate and breathing.
Correct Answer: C — Medulla oblongata
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Q. Which part of the brain is responsible for regulating heart rate?
-
A.
Cerebrum
-
B.
Cerebellum
-
C.
Medulla oblongata
-
D.
Thalamus
Solution
The medulla oblongata controls autonomic functions, including heart rate and breathing.
Correct Answer: C — Medulla oblongata
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Q. Which part of the cell is responsible for packaging and modifying proteins?
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A.
Golgi apparatus
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B.
Lysosome
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C.
Nucleus
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D.
Mitochondria
Solution
The Golgi apparatus modifies, sorts, and packages proteins for secretion or delivery to other organelles.
Correct Answer: A — Golgi apparatus
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Q. Which pigment is primarily responsible for the green color of plants?
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A.
Carotenoids
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B.
Chlorophyll
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C.
Xanthophyll
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D.
Anthocyanins
Solution
Chlorophyll is the pigment that gives plants their green color and is essential for photosynthesis, allowing plants to absorb light energy.
Correct Answer: B — Chlorophyll
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Q. Which process describes the movement of water from the roots to the leaves of a plant?
-
A.
Translocation
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B.
Transpiration
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C.
Absorption
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D.
Capillarity
Solution
Translocation refers to the movement of water and nutrients through the plant, specifically from the roots to the leaves.
Correct Answer: A — Translocation
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Q. Which process do plants use to convert sunlight into chemical energy? (2019)
-
A.
Respiration
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B.
Photosynthesis
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C.
Fermentation
-
D.
Transpiration
Solution
Photosynthesis is the process by which plants convert sunlight into chemical energy stored in glucose.
Correct Answer: B — Photosynthesis
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Q. Which process involves the movement of water from the roots to the leaves?
-
A.
Transpiration
-
B.
Photosynthesis
-
C.
Respiration
-
D.
Germination
Solution
Transpiration is the process through which water is absorbed by plant roots and then evaporated from the leaves, creating a continuous flow of water.
Correct Answer: A — Transpiration
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Q. Which structure is found in plant cells but not in animal cells?
-
A.
Cell membrane
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B.
Mitochondria
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C.
Chloroplasts
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D.
Ribosomes
Solution
Chloroplasts are found in plant cells and are responsible for photosynthesis, while animal cells do not have them.
Correct Answer: C — Chloroplasts
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Q. Which system is responsible for the body's response to stress?
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A.
Nervous system
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B.
Endocrine system
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C.
Immune system
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D.
Both A and B
Solution
Both the nervous and endocrine systems work together to manage the body's response to stress.
Correct Answer: D — Both A and B
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Q. Which system is responsible for the production of hormones in the body?
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A.
Nervous system
-
B.
Endocrine system
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C.
Circulatory system
-
D.
Muscular system
Solution
The endocrine system produces hormones that regulate various functions in the body, including growth, metabolism, and mood.
Correct Answer: B — Endocrine system
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Q. Which system is responsible for the production of hormones?
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A.
Nervous system
-
B.
Endocrine system
-
C.
Circulatory system
-
D.
Muscular system
Solution
The endocrine system produces hormones that regulate various functions in the body.
Correct Answer: B — Endocrine system
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Q. Which vitamin is essential for the absorption of calcium in the body?
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A.
Vitamin A
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B.
Vitamin B12
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C.
Vitamin C
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D.
Vitamin D
Solution
Vitamin D is essential for the absorption of calcium, helping to maintain bone health.
Correct Answer: D — Vitamin D
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