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Why can protein digestion be affected if hydrochloric acid is low in the stomach?

Answer and explanation

Correct answer: Because pepsin needs an acidic medium to work

The governing concept is the role of gastric hydrochloric acid in protein digestion. Hydrochloric acid creates the acidic medium needed for pepsin to become active and function efficiently on proteins. If acid secretion is low, pepsin activity can decrease, so the initial breakdown of proteins in the stomach may be impaired. Option A is correct. Amylase acts mainly on starch, bile is produced by the liver, and villi are intestinal structures, so B, C and D are incorrect.

Related tags

StomachHydrochloric AcidPepsinProtein DigestionLife ProcessesWorld Of LivingScienceClass 10 Mcq

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