Question

Proteins are called the building blocks of the body. They’re needed for growth and development and to repair the normal wear and tear of the body. The body needs to digest proteins to make them available to fulfill these functions. Arrange the steps of the digestion of proteins in the correct order.

Answer 1

Proteins are chains of amino acid, these amino acids has to be broken down into individuals before getting absorbed by the body.

In the digestion of proteins, after protein formed a food bolus with other undigested nutrients, they came to the stomach.
The stomach secretes an enzyme called pepsin, which cut up protein into small polypeptides.

The digestion hasn't end yet. After that, they came to the duodenum. Enzyme protease is secreted. The polypeptides can be broken down into amino acid blocks.

Finally in the ileum, these amino acids can be absorbed and assimilated by the body for its uses!

Answer 2

The digestion of protein starts from stomach. As soon as the protein reaches the stomach, hydrochloric acid is released  which breakdown and denatures the protein. Pepsinogen a component of protein which breaks down into pepsin.  

The partially digested protein then moves into the small intestine for further digestion. The secreted enzyme such as secretin and cholecystokinin travels to the pancreas and trigger the secretion of bicarbonate. This bicarbonate helps in neutralizing the partially digested protein. Maximum digestion of protein takes place in small intestine.

The brush border of small intestine breakdown, the previous form of protein into amino acids. These amino acids are then transported to the liver where further metabolism takes place. The unabsorbed part is excreted through feaces.