What is the correct answer?


Active transport differs from passive transport in that active transport

A. requires energy.

B. always requires input of ATP.

C. moves molecules against a concentration gradient.

D. both (a) and (c)

Correct Answer :

D. both (a) and (c)

Active transport is the transport of ions or molecules. against a concentration gradient and it requires energy to do so. That energy does not always have to be directly supplied in the form of ATP.

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