MCQ Collection
Pakistan MCQs
Practice Pakistan questions with answers and explanations.
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Correct Answer: C. Passive movement through membrane proteins down a concentration gradient
Explanation:
Channels and carriers help polar or charged substances cross membranes.
No direct energy input is required.
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Correct Answer: D. Storage and maintenance of turgor pressure
Explanation:
The central vacuole stores water, ions, pigments, and wastes.
Its pressure helps support plant tissues.
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Correct Answer: D. A network of protein filaments supporting cell shape and movement
Explanation:
The cytoskeleton includes microtubules, microfilaments, and intermediate filaments.
It supports transport, division, and movement.
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Correct Answer: D. Movement against a concentration gradient using energy
Explanation:
Active transport uses pumps or coupled carriers.
It maintains ion gradients and cell homeostasis.
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Correct Answer: A. Storage and maintenance of turgor pressure
Explanation:
The central vacuole stores water, ions, pigments, and wastes.
Its pressure helps support plant tissues.
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Correct Answer: A. Cell support, intracellular transport, and chromosome movement
Explanation:
Microtubules form tracks for motor proteins.
They also form the mitotic spindle, cilia, and flagella.
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Correct Answer: A. Movement against a concentration gradient using energy
Explanation:
Active transport uses pumps or coupled carriers.
It maintains ion gradients and cell homeostasis.
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Correct Answer: B. Cellulose
Explanation:
Cellulose microfibrils provide strength to plant cell walls.
The wall supports and protects the cell.
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Correct Answer: B. Cell support, intracellular transport, and chromosome movement
Explanation:
Microtubules form tracks for motor proteins.
They also form the mitotic spindle, cilia, and flagella.
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Correct Answer: B. Movement against a concentration gradient using energy
Explanation:
Active transport uses pumps or coupled carriers.
It maintains ion gradients and cell homeostasis.
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Correct Answer: C. Cellulose
Explanation:
Cellulose microfibrils provide strength to plant cell walls.
The wall supports and protects the cell.
Choose an option to check your answer.
Correct Answer: C. Cell support, intracellular transport, and chromosome movement
Explanation:
Microtubules form tracks for motor proteins.
They also form the mitotic spindle, cilia, and flagella.
