The optimum pH at which the enzymes pepsin and trypsin of the human alimentary canal works are
- A.pH 2.0 and 7.9, respectively
- B.pH 4.5 and 3.5, respectively
- C.pH 9.5 and 4.5, respectively
- D.pH 7.0 and 8.0, respectively
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Pepsin works in the strongly acidic stomach, while trypsin works in the mildly alkaline small intestine. Pepsin is secreted by the chief cells of the stomach as inactive pepsinogen, which hydrochloric acid from the parietal cells turns into pepsin.
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