Question

One of the constituents of the pancreatic juice which is poured into the duodenum in humans is

• A. Trypsinogen.
• B. Chymotrypsin.
• C. Trypsin.
• D. Enterokinase.

Answer 1

The correct option is A

Trypsinogen.

The correct option is A.

Explanation for the correct option:

1. The pancreas secretes pancreatic juice.
2. Trypsinogen, chymotrypsinogen, procarboxypeptidase, and the enzyme elastase are all proenzymes that are present.
3. All of them have to do with protein digestion.
4. The substance that is injected into the human duodenum is trypsinogen.
5. Trypsinogen is transformed into trypsin, which is its active form, with the aid of the enterokinase enzyme found in the intestinal juice.
6. Large peptides are formed when trypsin digests protein molecules.

Explanation for the incorrect options:

Option B:

1. Trypsin, an enzyme found in pancreatic juice, transforms chymotrypsinogen, an inactive enzyme, into chymotrypsin.
2. When activated, chymotrypsin significantly contributes to the conversion of partially hydrolyzed proteins into peptides.

Option C:

1. A pancreatic enzyme called trypsin is produced to aid in digesting in the small intestine.
2. The enzyme Enterokinase activates trypsinogen, transforming it into the active form trypsin.
3. The other enzymes in the pancreatic juice are then activated by trypsin.

Option D:

The mucosal cells in the duodenum portion of the small intestine release enterokinase, an enzyme that is already present there.

Final answer: One of the constituents of the pancreatic juice which is poured into the duodenum in humans is trypsinogen.