Biology Bioenergetics KMU 2024
PMDC Verified Question 9 of 67
The pathway to the breakdown of glucose, carried out by micro-organisms, is called:
A
Lactic acid fermentation
B
Alcoholic fermentation
C
Cellular respiration
D
None of the above
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Alcoholic fermentation
Concept:

Microorganisms utilize specific anaerobic pathways to extract energy from glucose when oxygen is scarce.

Solution:

  • In specific microorganisms, most notably yeast, the anaerobic breakdown of glucose follows a specific pathway.
  • After glycolysis, pyruvate is decarboxylated and reduced to form ethanol and \( CO_2 \).
  • This entire process is classified as Alcoholic fermentation.


Why other options are incorrect:

  • Lactic acid fermentation primarily occurs in animal muscle cells and certain bacteria (like Lactobacilli), but standard microbiology/botany contexts highlight yeast's alcoholic fermentation as the classic micro-organism pathway for industrial/baking applications.

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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