What is common among amylase, rennin and trypsin?A) These are produced in stomachB) These act at a pH lower than 7C) These are all proteinsD) These all are proteolytic enzymes

D) These all are proteolytic enzymes

Amylase, rennin, and trypsin are all enzymes, and they are specifically proteolytic enzymes. Proteolytic enzymes are enzymes that break down proteins into smaller peptides or amino acids by hydrolyzing peptide bonds.

Here's a brief description of each enzyme:

Amylase: Amylase is an enzyme that breaks down carbohydrates, specifically starches and glycogen, into simpler sugars like maltose and glucose. It is not a proteolytic enzyme and is typically produced in the salivary glands and pancreas, not the stomach.

Rennin (also known as chymosin): Rennin is an enzyme found in the stomach of young mammals, including humans. It plays a role in coagulating milk by curdling the casein protein, aiding in the digestion of milk proteins. While it acts in the stomach, it is not a proteolytic enzyme in the same sense as trypsin.

Trypsin: Trypsin is a proteolytic enzyme produced in the pancreas. It plays a crucial role in the digestion of proteins in the small intestine by breaking down proteins into smaller peptides.

So, the common characteristic among amylase, rennin, and trypsin is that they are all enzymes, but they differ in their specific functions and where they are produced in the digestive system.