Chymotrypsin is a pancreatic digestive enzyme that is inactive until it is secreted into the intestines, where it is hydrolyzed by the protease Trypsin. One of the fragments that results from this hydrolysis is the active form. Chymotrypsin is activated by:.

A. Competitive activation.

B. Allosteric inhibition.

C. Allosteric activation.

D. Zymogen activation.

D. Zymogen activation.

Explanation:

A zymogen refers to the inactive form of a protein molecule which gets activated by the action of the other enzyme.

The chymotrypsinogen is one such example which is secreted by the pancreas but remains inactive until it is activated by the trypsin.

The chymotrypsinogen is cleaved into peptide which then cleaves the amino acids with the aromatic amino acids like tryptophan and tyrosine.  Thus after the conversion of chymotrypsinogen to the chymotrypsin, the enzyme helps in the digestion of the proteins.

Thus, Option-D is correct.

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