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The enzyme enterokinase helps in the conversion of

1. pepsinogen into pepsin
2. trypsinogen into trypsin
3. caseinogen into casein
4. proteins into polypeptides

Correct answer: trypsinogen into trypsin

Solution

Enterokinase (enteropeptidase) is a brush-border enzyme in the duodenum that activates trypsinogen to trypsin. Trypsin then helps activate other pancreatic digestive enzymes.

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