Biology Cell SZABMU 2023
PMDC Verified Question 48 of 143
In mitochondria, ATP synthase is located on its:
A
Inter membrane space
B
Inner membrane
C
Outer membrane
D
Matrix
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Inner membrane
Concept: Chemiosmosis requires a membrane barrier to establish a proton gradient.

Solution: ATP synthase is an enzyme complex physically embedded in the inner mitochondrial membrane (on the cristae). As protons flow back into the matrix through this enzyme, it uses the kinetic energy to phosphorylate ADP into ATP.

Distractor Autopsy: The matrix contains the Krebs cycle enzymes. The outer membrane is too porous to maintain a proton gradient.

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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