Question

Out of the aforementioned enzymes, the protein-digesting enzymes are
I. Amylase
II. Lipase
III. Pepsin
IV. Trypsin

A. I and II
B. I and III
C. II and III
D. II and IV
E. III and IV

Answer 1

Digestive enzymes are the catalysts that cut down polymeric macro-particles into simple building blocks to help their digestion by the body.

Complete Answer:
Let us examine the options to find the correct answer.
Option A: Amylase is a digestive enzyme that splits starch into small carbohydrate particles. Lipase enzyme cuts down dietary fats into smaller particles known as fatty acids and glycerol. Therefore, this is an incorrect option.

Option B: Amylase is the breakdown of carbohydrates, producing glucose.
Pepsin is an endopeptidase that cuts down proteins into smaller peptides. Here only III is the protein-digesting enzyme. Therefore, this is an incorrect option.

Option C: Lipase enzyme cuts down dietary fats into smaller particles termed as fatty acids and glycerol. Pepsin is synthesised in the chief cells of the stomach wall and is one of the main digestive proteins where it helps absorb the proteins in food. Here only III is the correct answer, therefore this is an incorrect option.

Option D: Lipase enzyme digests fats exist in the food. Trypsin is a catalyst that aids us to digest protein. Here only IV is correct, therefore this is an incorrect option.

Option E: Protein digestive catalysts are trypsin and pepsin. They break down proteins into smaller amino acids and peptides. Pepsin is produced by the gastric gland in the stomach whereas trypsin is produced by Pancreas. Therefore this is the correct option.

Thus, option E is the correct answer.

Note: In the small intestine, trypsin breaks down proteins, extending the process of digestion that started in the stomach. It is also known as a proteinase or proteolytic enzyme. Pepsin is a catalyst in the stomach that stimulates breakdown of the protein in your food. It acts on the proteins in eggs, dairy products, meat, seeds, and nuts.