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.
Frequently asked questions
What is the correct answer to this question?
Acid helps digestion and germ control, while mucus protects the stomach wall.
Why is this the correct answer?
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.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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