#1) A fish eats another fish. Starting in the stomach of a typical gastric fish, explain how the proteins are broken down and absorbed, as well as how the functional units are subsequently used as energy and what waste product is produced.
Proteins undergo a series of steps when being digested from a full protein to amino acids. In the stomach, cells secrete pepsinogen along with H+ into the lumen. The excess of H+ ions lowers the pH of the stomach, activating pepsinogen and turning it into pepsin, a protease that breaks down large proteins to produce large polypeptides, these molecules are then transported to the small intestines where trypsin degrades it to dipeptides which are then further broken down into amino acids via dipeptidase. These
Proteins undergo a series of steps when being digested from a full protein to amino acids. In the stomach, cells secrete pepsinogen along with H+ into the lumen. The excess of H+ ions lowers the pH of the stomach, activating pepsinogen and turning it into pepsin, a protease that breaks down large proteins to produce large polypeptides, these molecules are then transported to the small intestines where trypsin degrades it to dipeptides which are then further broken down into amino acids via dipeptidase. These