What is the end product of protein digestion?

What is the end product of protein digestion?

• A. Peptides
• B. Amino acids
• C. Monosaccharides
• D. Nucleotides

Answer: (B)

Amino acids are the end product of protein digestion. Proteins are first broken down by proteases like pepsin in the stomach and trypsin and chymotrypsin in the small intestine, which cut the long chains into smaller peptides. Brush-border enzymes in the intestinal lining complete the process by releasing free amino acids from these peptides. The body then uses these amino acids for protein synthesis and various metabolic needs. Intermediates such as short peptides are not the final products, which is why peptides aren’t the correct end product. Monosaccharides come from carbohydrate digestion, not protein digestion, and nucleotides come from nucleic acid digestion, not proteins.

Amino acids are the end product of protein digestion. Proteins are first broken down by proteases like pepsin in the stomach and trypsin and chymotrypsin in the small intestine, which cut the long chains into smaller peptides. Brush-border enzymes in the intestinal lining complete the process by releasing free amino acids from these peptides. The body then uses these amino acids for protein synthesis and various metabolic needs.

Intermediates such as short peptides are not the final products, which is why peptides aren’t the correct end product. Monosaccharides come from carbohydrate digestion, not protein digestion, and nucleotides come from nucleic acid digestion, not proteins.