It is the form of energy produced in the mitochondria and is the cell's engine responsible for all cell. function. b. It is the form of energy produced in the endoplasmic reticulum and is the cell's engine responsible for. all cell function.
Pepsinâs main function is to break down proteins that are found in protein rich foods such as meat, eggs etc. It breaks them into smaller pieces called polypeptides. Interesting thing about pepsin is that it breaks proteins only at certain points so that the protein is not digested completely to the amino acid level.epsinogen is a pro-form zymogen of pepsin. It is released in the stomach by its chief cells. This zymogen is activated by hydrochloric acid released from parietal cells in the stomach linings.
Protein digestion begins with the action of an enzyme called pepsin. Pepsin is the active protein-digesting enzyme of the stomach. Pepsin acts on protein molecules by breaking the peptide bonds that hold the molecules together. Digestion of protein is completed in the small intestine by the pancreatic enzymes trypsin, chymotrypsin, and carboxypeptidase.