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Why are both acid and mucus necessary in the stomach?

Answer and explanation

Correct answer: Acid helps digestion and germ control, while mucus protects the stomach wall.

The governing concept is the protective and digestive role of stomach secretions. Hydrochloric acid provides an acidic medium that activates pepsin and helps destroy many swallowed microbes. The mucus layer forms a protective barrier so that acid and digestive enzymes do not significantly damage the stomach lining. Therefore, option A correctly combines both functions; the other options describe processes unrelated to the stomach.

Related tags

Stomach AcidMucusDigestionGastric ProtectionLife ProcessesWorld Of LivingScienceClass 10 Mcq

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