Question

Pancreatic juice takes part in digestion of
(a) Proteins, carbohydrates, and fats
(b) Proteins and fats
(c) Proteins, carbohydrates
(d) Proteins only

Answer 1

Hint: The pancreatic juice contains pancreatic amylase, trypsinogen, chymotrypsin, Carboxypeptidase, pancreatic lipase, phospholipase, and cholesterol esterase and is secreted by the pancreas.

Complete answer:
Following are the role of different enzymes in pancreatic juice:
1. Pancreatic amylase: Its main function is the digestion of carbohydrates (polysaccharide). It breaks the polysaccharide into disaccharides.
2. Trypsinogen: It is a proenzyme (non- active enzyme), activated by enterokinase enzyme of intestinal juices and forms trypsin. The trypsin helps in the digestion of protein molecules.
3. Chymotrypsin: This is an enzyme, formed from chymotrypsinogen with the help of trypsin. It helps in the digestion of proteins.
4. Carboxypeptidase: This enzyme helps in the digestion of protein and is activated by trypsin. It is formed from procarboxypeptidase.
5. Pancreatic lipase: It is the principal fat-digesting enzyme of pancreatic juice. Pancreatic lipase is also known as Steapsin.
6. Phospholipase and cholesterol esterase: These help in breaking down the fat molecules, so help in fat digestion.
The pancreatic juice also contains two enzymes which help in the digestion of nucleic acid. These are Ribonuclease and Deoxyribonuclease, which help in the digestion of RNA and DNA molecules.
So, the correct answer is, ‘Proteins, carbohydrates, and fats.’

Note: Enzymes are made of proteins whose main function is to serve as a molecule which fastens the rate of the chemical reaction. The pH of the pancreatic juice is 8.8