LEAP 2025 Biology Practice Questions - LEAP 2025 Biology Assessment Exam

Simple diffusion across a cell membrane is classified as passive transport because it:

Moves solute particles down their concentration gradient without requiring cellular energy (ATP). Requires ATP hydrolysis to pump molecules against their concentration gradient. Relies on vesicle formation to transport large macromolecules across the lipid bilayer. Uses protein channels to move water molecules against a osmotic gradient.

Correct Answer:

Moves solute particles down their concentration gradient without requiring cellular energy (ATP).

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