Passive transporter proteins allow molecules to move across a membrane in response to
A) chemical gradients.
B) ADP/ATP ratio.
C) ATP/ADP ratio.
D) activated signal transduction pathways.

Question

Quizplus · Accepted Answer

Passive transporter proteins move molecules across a membrane in response to chemical gradients, which means the molecules move from an area of high concentration to low concentration passively without the use of energy. ADP/ATP ratio and ATP/ADP ratio refer to the balance between adenosine triphosphate (ATP) and adenosine diphosphate (ADP), which is important for energy metabolism but not directly related to membrane transport. Activated signal transduction pathways involve the activation of specific proteins to initiate a response within a cell, also unrelated to passive transporter proteins.

Passive Transporter Proteins Allow Molecules to Move Across a Membrane