ANATOMY

Detailed explanation-1: -Proteins are broken down into amino acids, also called their building blocks. They are essential for all cells to build new proteins.

Detailed explanation-2: -Once a protein source reaches your stomach, hydrochloric acid and enzymes called proteases break it down into smaller chains of amino acids. Amino acids are joined together by peptides, which are broken by proteases. From your stomach, these smaller chains of amino acids move into your small intestine.

Detailed explanation-3: -True. Proteins are composed of amino acids.

Detailed explanation-4: -Enzymes in the stomach and small intestine break down proteins into amino acids.

Detailed explanation-5: -Proteolytic enzymes or proteases are the groups of enzymes that break proteins into shorter peptides and then into amino acids. The main proteolytic enzymes are pepsin, trypsin, chymotrypsin, carboxypeptidase, dipeptidase, etc.