Answer
The correct answer is $b. lingual -lipase.$
Work Step by Step
Lingual lipase is an enzyme that acts in the stomach. It is secreted by the lingual glands in the mouth and becomes activated in the acidic environment of the stomach. Lingual lipase begins the process of breaking down lipids (fats) into smaller molecules, such as fatty acids and glycerol.
The other enzymes mentioned are typically involved in digestion in the small intestine:
a. Chymotrypsin - This enzyme is produced by the pancreas and acts in the small intestine to further break down proteins into smaller peptides.
c. Carboxypeptidase - Also produced by the pancreas, carboxypeptidase acts in the small intestine to remove amino acids from the carboxyl end of peptides.
d. Enterokinase - This enzyme is found in the small intestine and is responsible for activating trypsinogen into trypsin, which then plays a role in the activation of other pancreatic enzymes.
e. Dextrinase - This enzyme is involved in carbohydrate digestion and is present in the small intestine, where it breaks down complex carbohydrates like dextrins into simpler sugars.
So, the correct enzyme that acts in the stomach is $lingual lipase$.
