Biology Enzymes ETEA 2023
PMDC Verified Question 32 of 79
The optimal pH of lipase (pancreas) is:
A
4.0 - 5.0
B
1.5 - 1.6
C
8.0
D
6.1 - 6.8
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: 8.0
Concept:

Enzymes secreted into the digestive tract are optimized for the specific pH of their target compartment.

Solution:

  • Pancreatic lipase is secreted by the pancreas into the duodenum (small intestine) to digest dietary lipids.
  • The environment of the small intestine is neutralized by bicarbonate secretions, creating an alkaline medium.
  • Therefore, the optimal pH for pancreatic lipase is highly alkaline, specifically around 8.0 (and can range up to 9.0).


Why other options are incorrect:

1.5 - 1.6 is highly acidic (optimal for stomach pepsin). 4.0 - 5.0 is mildly acidic. 6.1 - 6.8 is nearly neutral (optimal for salivary amylase). Pancreatic enzymes require a basic 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.

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