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.
Frequently asked questions
What is the correct answer to this question?
Acid provides the proper medium for an enzyme, and mucus protects the stomach
Why is this the correct answer?
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.
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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