Biology Support & Movement UHS 2022
PMDC Verified Question 59 of 75
Which of the following is a muscle component that acts as store for energy?
A
ATP
B
Creatine-PO\(_4\)
C
Myoglobin
D
Creatinine-PO\(_4\)
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Creatine-PO\(_4\)
Concept:

Phosphagen energy systems in skeletal muscle.

Formula:

$$ADP + Phosphocreatine \rightleftharpoons ATP + Creatine$$

Solution:

  • Muscles contain very little stored, readily available ATP (only enough for a few seconds of intense contraction).


  • To rapidly replenish ATP, resting muscles synthesize and store high-energy phosphate bonds in a backup molecule called Creatine Phosphate (Creatine-PO\(_4\)).


  • During sudden bursts of activity, the phosphate is instantly donated back to ADP to regenerate ATP.


Why other options are incorrect:

ATP is an immediate currency, not a long-term 'store'. Creatinine is a metabolic waste product filtered by the kidneys, not an energy molecule.

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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