Biology Cell MDCAT 2019
PMDC Verified Question 107 of 143
Passive processes for the movement of molecules across cell surface membrane are:
A
Osmosis and phagocytosis
B
Pinocytosis and facilitated diffusion
C
Facilitated diffusion and osmosis
D
Diffusion and exocytosis
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Facilitated diffusion and osmosis
Concept: Passive transport requires no expenditure of metabolic energy (ATP) because molecules move down their concentration gradient.

Solution: Both osmosis (movement of water) and facilitated diffusion (movement of molecules via carrier proteins) operate without ATP, classifying them as passive processes.

Distractor Autopsy: Phagocytosis, pinocytosis, and exocytosis are forms of bulk transport that require significant ATP expenditure (Active processes).

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