Question

The following diagram shows the action of protein digesting enzymes of pancreas.

(a) Label the number 1, 2 and 3. 

(b) Trypsinogen and Chymotrypsinogen are proenzymes (inactive enzymes). Why do they being produced inactive?

Answer 1

(a)  1. Enterokinase 

2. Chymotrypsin 

3. Peptides

(b) Trypsin and Chymotrypsin are protein digesting enzyme formed from their respective inactive forms at the time of digestion of the protein food. If they are available all time in active form, they would damage the intestinal wall.