UPSC Prelims 2005·GS1·science-and-technology·science and technology

Assertion (A): All the proteins in our food are digested in small intestine only. Reason (R): The Protein digesting enzymes from pancreas are released into small intestine.

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Last updated 23 May 2026, 3:31 pm IST
  1. ABoth (A) and (R) are individually true and R is the correct explanation of A
  2. BBoth (A) and (R) are individually true and R is not the correct explanation of A
  3. CA is true but R is false
  4. DA is false but R is trueCorrect

Explanation

Assertion A is false because protein digestion does not occur only in the small intestine — it begins in the stomach with the enzyme pepsin, which breaks down proteins into smaller peptides in an acidic environment. Reason R is true because the pancreas secretes inactive enzymes like trypsinogen and chymotrypsinogen into the small intestine, where they are activated to further break down proteins into amino acids. Since A is false and R is true, the correct answer is D.
science-and-technology: Assertion (A): All the proteins in our food are digested in small intestine only. Reason (R): The Protein digesting enzy
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