Q133 / 270 · NDA 2025 (Phase 2) · General Ability
The optimum pH at which the enzymes pepsin and trypsin of the human alimentary canal works are
- Correct answerApH 2·0 and 7·9, respectively
- BpH 4·5 and 3·5, respectively
- CpH 9·5 and 4·5, respectively
- DpH 7·0 and 8·0, respectively
Solution
Pepsin is a proteolytic enzyme secreted in the stomach, which requires a highly acidic medium for its optimal activity. The optimum pH for pepsin is around $1\cdot8$ to $2\cdot0$.
Trypsin is a proteolytic enzyme secreted by the pancreas into the small intestine, which requires a slightly alkaline medium for its optimal activity. The optimum pH for trypsin is around $7\cdot8$ to $8\cdot0$.
Therefore, the optimum pH values for pepsin and trypsin are approximately $2\cdot0$ and $7\cdot9$, respectively.
Answer: pH 2·0 and 7·9, respectively
Trypsin is a proteolytic enzyme secreted by the pancreas into the small intestine, which requires a slightly alkaline medium for its optimal activity. The optimum pH for trypsin is around $7\cdot8$ to $8\cdot0$.
Therefore, the optimum pH values for pepsin and trypsin are approximately $2\cdot0$ and $7\cdot9$, respectively.
Answer: pH 2·0 and 7·9, respectively
Hence, the correct answer is option: 'A'.