Solved UPSC CDS/OTA Question
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Q · Digestive Systemmedium · 45s
Pepsin works best in:
TopicDigestive System
Question Typemultiple choice
Difficultymedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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Pepsin, a proteolytic enzyme secreted as pepsinogen by chief cells, becomes active in the stomach’s highly acidic environment (pH 1.5–3.5) created by hydrochloric acid from parietal cells. Pepsin cleaves peptide bonds to initiate protein digestion into smaller polypeptides.
Final Answer: Option A - Acidic medium