MCQ Collection
MDCAT 2026 MCQs
Practice MDCAT 2026 questions with answers and explanations.
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Correct Answer: D. Reaction of an acid and base to form water and a salt
Explanation:
In many aqueous neutralizations, H+ and OH- form water.
The remaining ions form a salt.
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Correct Answer: D. Mechanical mixing and initiation of protein digestion
Explanation:
The stomach churns food and secretes acid and pepsin.
It produces chyme for delivery to the small intestine.
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Correct Answer: A. Mechanical mixing and initiation of protein digestion
Explanation:
The stomach churns food and secretes acid and pepsin.
It produces chyme for delivery to the small intestine.
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Correct Answer: B. Salivary amylase
Explanation:
Salivary amylase breaks starch into smaller carbohydrates.
Its activity decreases in the acidic stomach.
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Correct Answer: C. Salivary amylase
Explanation:
Salivary amylase breaks starch into smaller carbohydrates.
Its activity decreases in the acidic stomach.
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Correct Answer: D. Salivary amylase
Explanation:
Salivary amylase breaks starch into smaller carbohydrates.
Its activity decreases in the acidic stomach.
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Correct Answer: A. Pepsin
Explanation:
Pepsin works in acidic conditions.
It breaks proteins into shorter peptides.
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Correct Answer: B. Pepsin
Explanation:
Pepsin works in acidic conditions.
It breaks proteins into shorter peptides.
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Correct Answer: C. Pepsin
Explanation:
Pepsin works in acidic conditions.
It breaks proteins into shorter peptides.
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Correct Answer: D. Emulsify fats
Explanation:
Bile salts disperse large fat globules into small droplets.
This increases surface area for lipase.
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Correct Answer: A. Break down food and absorb nutrients
Explanation:
Digestion converts large food molecules into absorbable units.
The small intestine absorbs most nutrients.
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Correct Answer: A. Emulsify fats
Explanation:
Bile salts disperse large fat globules into small droplets.
This increases surface area for lipase.
