MCQ Collection
MDCAT Biology MCQs
Practice MDCAT Biology questions with answers and explanations.
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Correct Answer: A. It loses water and shrinks
Explanation:
Water moves out toward the higher solute concentration.
The cell undergoes crenation.
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Correct Answer: B. It loses water and shrinks
Explanation:
Water moves out toward the higher solute concentration.
The cell undergoes crenation.
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Correct Answer: A. Release of material when vesicles fuse with the plasma membrane
Explanation:
Exocytosis secretes hormones, enzymes, and neurotransmitters.
It also adds membrane components to the cell surface.
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Correct Answer: B. Release of material when vesicles fuse with the plasma membrane
Explanation:
Exocytosis secretes hormones, enzymes, and neurotransmitters.
It also adds membrane components to the cell surface.
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Correct Answer: C. Release of material when vesicles fuse with the plasma membrane
Explanation:
Exocytosis secretes hormones, enzymes, and neurotransmitters.
It also adds membrane components to the cell surface.
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Correct Answer: D. Cellular engulfment of large particles
Explanation:
Phagocytosis is often called cell eating.
Immune cells use it to engulf microbes and debris.
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Correct Answer: A. Cellular engulfment of large particles
Explanation:
Phagocytosis is often called cell eating.
Immune cells use it to engulf microbes and debris.
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Correct Answer: B. Cellular engulfment of large particles
Explanation:
Phagocytosis is often called cell eating.
Immune cells use it to engulf microbes and debris.
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Correct Answer: C. Cellular uptake of extracellular fluid and dissolved substances
Explanation:
Pinocytosis is often called cell drinking.
Small vesicles form from the plasma membrane.
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Correct Answer: A. Uptake of material by formation of membrane vesicles
Explanation:
The plasma membrane surrounds material and pinches inward.
Phagocytosis and pinocytosis are forms of endocytosis.
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Correct Answer: D. Cellulose
Explanation:
Cellulose microfibrils provide strength to plant cell walls.
The wall supports and protects the cell.
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Correct Answer: D. Cell shape changes, movement, and contraction
Explanation:
Microfilaments are mainly composed of actin.
They participate in cell crawling, cytokinesis, and muscle contraction.
