Biology Enzymes BUMHS 2022
PMDC Verified Question 53 of 79
Optimum pH for digestive enzymes of stomach is:
A
Slightly acidic
B
Highly alkaline
C
Highly acidic
D
Slightly alkaline
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Highly acidic
Concept:

The stomach is a unique digestive compartment designed to aggressively break down tough food particles and kill incoming pathogens.

Solution:

  • The parietal cells of the stomach lining secrete concentrated Hydrochloric Acid (\( \text{HCl} \)).
  • This drops the stomach's pH down to a drastically low level of approximately 2.0.
  • Therefore, the chief digestive enzyme of the stomach, pepsin, requires a highly acidic optimum pH to function effectively.


Why other options are incorrect:

A slightly acidic pH (like 6) is found in the mouth (saliva). Alkaline conditions exist in the small intestine. Only the stomach maintains a highly acidic environment.

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.

Previous Question All Enzymes MCQs Next Question

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.

Enter Arena Sprint iOS App Android App