Question

. What is mandatory in the process of facilitated diffusion

1) Presence of concentration gradient

2) A carrier protein

3) A hydrophilic moeity

4) All of these​

Answer 1

1.A Carrier protein

- This is the answer

Answer 2

4) All of these is the correct answer.

• Facilitated diffusion is also known in other terms as passive transport. It is defined as the movement of molecules across the semi permeable membrane, with the help of transmembrane proteins.
• Facilitated diffusion can cause movement both towards and against concentration gradient. Concentration gradient is required.
• Hydrophilic molecules can not cross the membrane and hence requires a carrier protein and energy in the form of ATP