Question

During digestion of food in alimentary canal, protein is acted upon by enzymes in the following sequence

• A. Ptyalin, trypsin and peptidase
• B. Peptidase, trypsin and pepsin
• C. Pepsin, trypsin and peptidase
• D. Ptyalin, pepsin and trypsin

Answer 1

The correct option is C Pepsin, trypsin and peptidase

Pepsin is an enzyme whose zymogen (pepsinogen) is released by the chief cells in the stomach and that degrades food proteins into peptides. Trypsin continues the process of digestion begun in the stomach in the small intestine where a slightly alkaline environment (about pH 8) promotes its maximal enzymatic activity. Acid proteases (also called peptidase or proteinase) secreted into the stomach (such as pepsin) and serine proteases present in duodenum (trypsin and chymotrypsin) enable us to digest the protein in food.

Therefore, the correct answer is option C.