Protein digestion occurs in various steps. Protein is made up of polypeptides so the peptide linkage between them has to be broken down first. The protein is then converted into peptides. Peptides are further broken down to amino acid which acts as the simplest molecule for absorption.
Further explanation:
<u>Protein</u> is a <u>biomolecule</u> which consists of amino acids. The amino acids are linked together through the peptide linkage. It is the complex molecule which is broken down into smaller molecules during the process of digestion.
Most of the protein digestion takes place in stomach. In stomach, pepsin produced by stomach chief cells acts on protein and converts it into peptides. Various<u> proteases</u> are involved in digestion of different types of proteins.
<u>Trypsin</u>, <u>elastase</u> <u>chymotrypsin</u> and <u>carboxypeptidase</u> produced by pancreas is released into duodenum where they acts on protein and peptides and converts them into peptides and amino acids, respectively.
<u>Aminopeptidase</u> and <u>dipeptidase</u> present at the surface of intestine converts peptides into amino acids.
The proteins coverted into amino acids are then absorbed by small intestine through the help of microvilli. The microvilli provide good surface area for the absorption to occur in the small intestine.
Learn more:
1. Learn more about protein structure brainly.com/question/1420458
2. Learn more about protein locations brainly.com/question/5923583
3. Learn more about amino acids brainly.com/question/5050077
Answer Detail:
Grade: Middle school
Subject: Biology
Chapter: Digestion
Keywords:
Proteins, biomolecule, amino acids, peptide, digestion, pepsin, proteases, trypsin, elastase chymotrypsin, carboxypeptidase, pancreas, aminopeptidase, dipeptidase.