Which of the following statements characterizes the major difference in solute t

Question

Which of the following statements characterizes the major difference in solute transport through a water filled channel and by facilitated diffusion (carrier mediated)?

A. ATP is required for facilitated diffusion but not for diffusion through a pore.

B. Solute size influences facilitated diffusion but not for diffusion through a pore.

C. Facilitated diffusion but not diffusion through a pore can move a solute against a concentration gradient.

D. Facilitated diffusion but not diffusion through a pore shows saturation.

E. Diffusion through a pore but not facilitated diffusion shows saturation.

Explanation / Answer

In faciiliated diffusion carriers mediated process enable molecules that are too large to flow through membranes channels by diffusion .it doesnot requires ATP.so option A incoreect.

2 solute size affacts both diffusion and facilliated diffusion. So option B is also incorrect

3there is no movement against the concerntration.

4faciillated diffusion rate of diffusion increase with increase in concerntration gradient to reach a plateu when all the bindings site on the carriers proteins are filled .this is called saturation. .but simple diffusion do not show saturation. So option D Is corect

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