Biology Enzymes KMU 2024
PMDC Verified Question 12 of 79
Optimum pH for pancreatic lipase is:
A
2
B
4
C
6
D
8
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: 8
Concept:

The digestive system is compartmentalized. The stomach is acidic, but the small intestine must be alkaline to protect the tissue and activate a new set of enzymes.

Solution:

  • The pancreas secretes lipase into the duodenum (small intestine) to digest fats.
  • The pancreas also secretes heavy concentrations of bicarbonate to neutralize incoming stomach acid, raising the intestinal pH to an alkaline level.
  • As an evolutionary result, pancreatic lipase operates best in a basic medium, specifically at a pH of roughly 8.0 (to 9.0).


Why other options are incorrect:

pH 2 is optimal for stomach enzymes (pepsin). pH 4 and 6 are acidic and would result in poor efficiency or denaturation of pancreatic enzymes.

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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