Question

Which of the following statements is not true about facilitated diffusion? I. Facilitated diffusion can cause net transport of molecules from a low to a high concentration. II. Facilitated diffusion requires energy in the form of ATP. III. Transport proteins are required for facilitated diffusion. IV. Facilitated diffusion is very specific and allows cell to select substance for uptake.

A

I, II, III and IV

B

II, III and IV

C

III and IV

D

I and II​

Answer 1

Answer:

Answer: C third and fourth

Answer 2

Answer: The correct answer is (D) Ist and IInd

Explanation: Facilitated diffusion does not cause net transport of molecules from low to high concentration as it would require the usage of ATP molecules which is the characteristic of Active Transport.

Instead, in facilitated diffusion special carrier protein movies specific substances along the concentration gradient, i.e. from high to low concentration.

Thus, 1st and 2nd options are incorrect as facilitated diffusion causes movement from high to low and without the cost of energy in form of ATPs.