Biology Enzymes MDCAT 2014
PMDC Verified Question 78 of 79
Which one of the following is the optimum pH of pancreatic lipase enzyme?
A
9.70
B
8.00
C
7.60
D
9.00
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: 9.00
Concept:

Enzymes have evolved to work optimally at the specific pH of their natural environment in the body.

Solution:

  • Pancreatic lipase is secreted by the pancreas into the small intestine to digest fats.
  • The environment of the small intestine is highly basic (alkaline) due to bicarbonate secretions.
  • Therefore, the optimum pH for pancreatic lipase is perfectly adapted to this alkaline medium, which is exactly 9.00.


Why other options are incorrect:

7.60 is the optimum for catalase, and 9.70 is the optimum for arginase. An optimum of 8.00 is slightly too low for pancreatic lipase's peak efficiency based on standard biological tables.

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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