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Why are both acid and mucus necessary in the stomach?

Answer and explanation

Correct answer: Acid provides the proper medium for an enzyme, and mucus protects the stomach

Hydrochloric acid creates the strongly acidic environment needed for the activation and effective action of pepsin, the stomach enzyme that begins protein digestion. However, acid could damage living stomach cells if it directly contacted the lining. A mucus layer, supported by protective secretions, coats the wall and helps prevent chemical injury. Therefore option A correctly explains the complementary roles; the other options confuse digestive, circulatory, plant, or impossible functions.

Related tags

StomachHydrochloric AcidMucusPepsinLife ProcessesWorld Of LivingScienceClass 10 Mcq

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