Question

Which of these best explains why energy is needed for active transport? *

Answer 1

Active transport requires energy because it moves molecules across a membrane to a region of lower to higher concentration which is often against their concentration gradient or has an obstructing factor.

Answer 2

Answer:

Ions are moved against the concentration gradient.

Explanation:

Active transport mechanisms require the use of the cell's energy, usually in the form of adenosine triphosphate (ATP).