Biology Nervous Coordination KMU 2024
PMDC Verified Question 21 of 86
The neurotransmitter ____ is hydrolyzed by monoamine oxidase.
A
Adrenaline
B
Acetylcholine
C
Glutamate
D
Serotonin
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Adrenaline
Concept:

Enzymatic degradation is specific to the chemical structure of the neurotransmitter.

Solution:

  • Monoamine Oxidase (MAO) is an enzyme specifically designed to break down monoamine neurotransmitters (compounds featuring a single amine group connected to an aromatic ring). Adrenaline (epinephrine), along with dopamine and noradrenaline, falls directly into this structural category and is metabolized by MAO.


Why other options are incorrect:

  • Acetylcholine: Hydrolyzed strictly by Acetylcholinesterase, not MAO.


  • Glutamate: An amino acid, cleared via reuptake transporters, not MAO.


  • Note: While Serotonin is also a monoamine broken down by MAO, classical syllabus emphasis on catecholamine degradation pathways prioritizes Adrenaline/Noradrenaline as the primary textbook answer here.

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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