Biology Digestion/Nutrition SZABMU 2023
PMDC Verified Question 16 of 48
Which Proteolytic enzyme is NOT secreted in inactive form?
A
Chymotrypsin
B
Pepsin
C
Trypsin
D
Erypsin
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Erypsin
Concept:

Major proteases produced by the stomach and pancreas are secreted as zymogens (inactive) to protect the organs. However, brush-border enzymes are often active immediately.

Formula:

N/A

Solution:

  • Pepsin is secreted as inactive pepsinogen.
  • Trypsin is secreted as inactive trypsinogen.
  • Chymotrypsin is secreted as inactive chymotrypsinogen.
  • Erepsin (a mixture of peptidases found in intestinal juice) is secreted directly in its active form to immediately process small peptides into single amino acids right at the absorption surface.


Why other options are incorrect:

Options A, B, and C are all classic examples of dangerous endopeptidases that absolutely must be secreted as inactive precursors to avoid self-digestion.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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