What is the difference between facilitated diffusion and active transport?
A. Facilitated diffusion uses ATP and moves substances with the
concentration gradient; active transport does not.
B. Active transport uses ATP and moves substances against the
concentration gradient; facilitated diffusion does not.
C. Active transport uses ATP and does not require a carrier protein;
facilitated diffusion does neither.
D. Facilitated diffusion uses ATP and requires a carrier protein; active
transport does not.