Question

Put the protein digestion steps in order of their occurrence during the digestive process.

Answer 1

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:

Protein is a biomolecule 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 proteases are involved in digestion of different types of proteins.

Trypsin, elastase chymotrypsin and carboxypeptidase produced by pancreas is released into duodenum where they acts on protein and peptides and converts them into peptides and amino acids, respectively.

Aminopeptidase and dipeptidase 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.

Answer 2

Protein digestion is a process of reducing the dietary protein into a pool of amino acids in the gastrointestinal tracts. These amino acids are then absorbed and transported to cells where they will mix and form variety of proteins the body needs. However, the process of digestion takes place in the mouth and ends in the small intestine with the help of enzymes and digestive juices.

Steps

· Mouth: chewing of protein rich food which increase the surface area of the food particles and aid the process of digestion.

· Stomach: the acid in the stomach denature and unfold the protein rich foods in other for digestive enzymes to act on the protein. This digestive enzyme digests the protein into smaller molecules called peptides.

· Small intestine: In the small intestine, more protein- digesting enzymes  that originate from pancreas and cells lining in the stomach work on the peptides and break them down into smaller peptides and sniped off the amino acid one by one.