Question

Which enzyme converts trypsinogen into trypsin?

Hint:

Enterokinase activation of trypsinogen is essential for initiating the cascade of digestive enzymes necessary for protein digestion in the small intestine.

Answer 1

1. Trypsinogen is an inactive precursor (zymogen) of the enzyme trypsin, which plays a crucial role in the digestion of proteins. 
2. Enterokinase, also known as enteropeptidase, is an enzyme secreted by the cells of the duodenum. It specifically cleaves trypsinogen to activate it into trypsin.

Conclusion: Therefore, the enzyme responsible for converting trypsinogen into its active form, trypsin, is enterokinase.