Biology Cell UHS 2022
PMDC Verified Question 74 of 143
Movement of molecules against the concentration gradient is:
A
Facilitated diffusion
B
Passive transport
C
Active transport
D
Filtration
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Active transport
Concept: Moving molecules from a region of lower concentration to a region of higher concentration requires energy.

Solution: Active transport uses cellular energy (usually ATP) to pump molecules against their natural concentration gradient using specific membrane carrier proteins (pumps).

Distractor Autopsy: Passive transport and facilitated diffusion only allow molecules to move down their concentration gradients.

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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