Which of the following statements correctly describes secondary active transport

Question

Which of the following statements correctly describes secondary active transport?

A. Solute transport into the cell requires binding to an integral protein that causes ATP to be converted to ADP.

B. Solute transport into the cell requires binding to an integral protein and movement into the cell down a diffusion gradient.

C. Solute transport into the cell requires binding to an integral protein that also binds one or more Na+ ions that move into the cell.

D. Solute transport into the cell requires diffusion through an integral protein that forms an aqueous pore.

E. Solute transport into the cell requires binding to a receptor on the membrane and that portion of the membrane becomes internalized, forming a vesicle within the cell.

Explanation / Answer

Answer is B

Solute transport into the cell requires binding to an integral protein and movement into the cell down a diffusion gradient.

In secondary active transport, the movement of a driving ion down an electrochemical gradient is used to drive the uphill transportof another ion/molecule against a concentration or electrochemical gradient.

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