Question

Which of the following does not require carrier molecules during transport through cell membranes?

• A. simple diffusion
• B. facilitated diffusion
• C. $N{{a}^{+}}-{{K}^{+}}$ transport
• D. none of these

Answer 1

Answer: (A)

simple diffusion

Answer 2

Simple diffusion i.e. Movement of molecules from higher concentration to lower concentration does not require carrier molecule for transport through cell membrane.