Question

what is the key difference between passive and active transport processes?
o only passive transport involves a concentration gradient.
o active transport requires energy.
o passive processes do not involve cell membranes.
o active transport processes result in equilibrium whereas passive transport processes do not.

Explanation:

Active transport moves substances against the concentration gradient and requires energy (ATP), while passive transport moves substances along the concentration gradient and does not require energy input from the cell.

Answer:

C. Active transport requires energy.