Biology for IGCSE & O level - Movement Into And Out Of Cells (Section 3 - No. 35)

Which of the following statements accurately describes the function of active transport?
It moves molecules against their concentration gradient, requiring energy.
It moves molecules down their concentration gradient, requiring energy.
It moves molecules against their concentration gradient, without requiring energy.
It moves molecules down their concentration gradient, without requiring energy.

Explanation

Active transport moves against the gradient and needs energy.

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