Biology · Nutrition
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_____ is activated to_____ by Enterokinase enzyme secreted by the lining of duodenum:
- A
Pepsinogen, Pepsin
- B
Pepsinogen, Trypsin
- C
Trypsinogen, Trypsin
- D
Chymotrypsinogen, Chymotrypsin
The correct answer is Trypsinogen is activated to Trypsin by Enterokinase, which is an enzyme secreted by the lining of the duodenum. This activation is crucial for protein digestion as trypsin further activates other proteolytic enzymes, facilitating the breakdown of proteins. Pepsinogen to Pepsin conversion occurs in the stomach, activated by hydrochloric acid. Chymotrypsinogen is activated to Chymotrypsin by trypsin itself, not directly by Enterokinase.
Pepsinogen is converted to pepsin, but this occurs in the stomach and is activated by hydrochloric acid, not Enterokinase.
This option is incorrect because pepsinogen is activated to pepsin, and trypsin is activated from trypsinogen.
Correct. Trypsinogen is activated to trypsin by the enzyme Enterokinase, which is secreted by the lining of the duodenum. Trypsin is crucial for protein digestion in the small intestine.
Chymotrypsinogen is activated to chymotrypsin by trypsin, not by Enterokinase, making this option incorrect for the question.
Tagged under Biology · Nutrition · 2013