In order to prevent self-digestion of the pancreas, activation of pancreatic proteases occurs in the .

duodenum

Explanation:

In mammals, the duodenum represents the initial portion of the small intestine, while the pancreas is a gland that secretes enzymes into the duodenum in order to help with the process of digestion of foods consumed. The pancreas secretion contains distinct enzymes including, among others, trypsinogen, chymotrypsinogen, amylase, and lipase which are capable of breaking down larger macromolecules. The pancreas also secretes insulin and glucagon hormones required to regulate blood sugar levels. Moreover, it is important to note that the duodenum is also involved in the absorption of iron.

i think it is dna, i'm not totally sure but i think it might be.

what are the options