Question

The digestion of polypeptides begins in the mouth with the enzyme pepsin. True or False

Answer 1

The digestion of polypeptides does not begin in the mouth with the enzyme pepsin; this is a false statement. Protein digestion actually commences in the stomach with the action of HCl and pepsin and continues in the small intestine with other enzymes.

Step-by-step explanation:

The statement that the digestion of polypeptides begins in the mouth with the enzyme pepsin is False. Digestion of proteins, indeed, starts in the stomach where hydrochloric acid (HCl) and pepsin break down proteins into smaller polypeptides. In the duodenum of the small intestine, pancreatic enzymes such as chymotrypsin and trypsin continue the chemical digestion by acting on specific bonds in amino acid sequences. Additionally, brush border enzymes like aminopeptidase and dipeptidase further degrade peptide chains into molecules small enough to be absorbed into the bloodstream.

Answer 2

It is false that the digestion of polypeptides begins in the mouth with the enzyme pepsin.

Step-by-step explanation:

The food is consumed through the mouth. Here the saliva has an enzyme called amylase which helps in the breaking down of foods to simpler substances. The food is sent through the oesophagus to the stomach.

In the stomach pepsin breaks down proteins into polypeptides. In stomach is where the enzyme pepsin is found. Then the bile juice secreted in the liver acts upon the digested food and then in the small intestine. Then the feces are excreted through the anus.