How do active transport and facilitated diffusion differ? a one uses help from proteins and the other does not b one requires energy and the other does not c active transport moves molecules against a concentration gradient and facilitated diffusion does not d both b & c

Answer 1

The correct answer is d both b & c.

To elaborate:

• Active transport requires energy (usually in the form of ATP) to move molecules against their concentration gradient (from areas of lower concentration to areas of higher concentration).
• Facilitated diffusion, on the other hand, does not require energy and moves molecules down their concentration gradient (from areas of higher concentration to areas of lower concentration).

Both processes can involve helper proteins, but the key differences lie in the energy requirement and the direction of movement relative to the concentration gradient.