MCQ Collection
MDCAT 2026 MCQs
Practice MDCAT 2026 questions with answers and explanations.
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Correct Answer: C. It supplies H and OH to split a bond
Explanation:
Hydrolysis uses a water molecule to break a covalent bond.
The products receive hydrogen and hydroxyl groups.
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Correct Answer: C. Increase the speed of impulse conduction
Explanation:
Myelin electrically insulates the axon.
Impulses jump between nodes of Ranvier by saltatory conduction.
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Correct Answer: D. They contain more energy-rich C-H bonds
Explanation:
Fats are more reduced than carbohydrates.
Their oxidation supplies more high-energy electrons to respiration.
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Correct Answer: D. It supplies H and OH to split a bond
Explanation:
Hydrolysis uses a water molecule to break a covalent bond.
The products receive hydrogen and hydroxyl groups.
Choose an option to check your answer.
Correct Answer: A. They contain more energy-rich C-H bonds
Explanation:
Fats are more reduced than carbohydrates.
Their oxidation supplies more high-energy electrons to respiration.
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Correct Answer: A. A protein with attached carbohydrate groups
Explanation:
Glycoproteins contain covalently attached carbohydrate chains.
They function in receptors, recognition and cell adhesion.
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Correct Answer: B. Krebs cycle
Explanation:
Acetyl-CoA and other intermediates enter the Krebs cycle.
Different food molecules therefore converge on common respiratory pathways.
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Correct Answer: B. A protein with attached carbohydrate groups
Explanation:
Glycoproteins contain covalently attached carbohydrate chains.
They function in receptors, recognition and cell adhesion.
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Correct Answer: C. Krebs cycle
Explanation:
Acetyl-CoA and other intermediates enter the Krebs cycle.
Different food molecules therefore converge on common respiratory pathways.
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Correct Answer: C. A protein with attached carbohydrate groups
Explanation:
Glycoproteins contain covalently attached carbohydrate chains.
They function in receptors, recognition and cell adhesion.
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Correct Answer: D. Krebs cycle
Explanation:
Acetyl-CoA and other intermediates enter the Krebs cycle.
Different food molecules therefore converge on common respiratory pathways.
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Correct Answer: D. Outer surface of the plasma membrane
Explanation:
Glycolipids are membrane lipids with carbohydrate groups.
They contribute to cell recognition and membrane stability.
