Question Detail

BIO 101 BIO 101 Past Questions Objective Question
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Question

During facilitated diffusion, substances move across membranes:
Options
A Against their concentration gradient
B Down their concentration gradient with help from transport proteins
Correct Answer
C Using energy from ATP
D Through phagocytosis
Correct Answer

Option B is the correct answer.

Detailed Explanation

Facilitated diffusion is a passive transport process where substances move from an area of higher concentration to lower concentration with the assistance of specific transport proteins (channels or carriers). No cellular energy is expended.

Hint

It's passive but requires a helper protein.

Question Info

Course: BIO 101
Topic: BIO 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 818 of 2556
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