Which of the following is a feature that distinguishes active transport from facilitated diffusion?
A) saturation of transport rate
B) requirement for a carrier molecule
C) carrier molecules have specificity
D) presence of a transport maximum
E) requirement for metabolic energy

Question

Quizplus · Accepted Answer

Active transport requires metabolic energy to move molecules against their concentration gradient, while facilitated diffusion relies on the concentration gradient to move molecules with the help of carrier molecules. The other features listed (saturation of transport rate, requirement for a carrier molecule, specificity of carrier molecules, and presence of a transport maximum) are shared by both active transport and facilitated diffusion.

Which of the Following Is a Feature That Distinguishes Active