Question

To move the Na+ from B to A would require a _ transport and this process will require _type of transporter.

A. Passive; channel

B. Simple diffusion; carrier

C. Active; channel

D. Active; carrier

Answer 1

The correct option is D - Active; carrier

In Active transport, molecules move from low concentration to high concentration. So it requires energy. Carrier proteins usually transport ions from low concentration to high concentration and it requires energy. In the above question, sodium ions move from low concentration to high concentration and it is active transport and the process require carrier proteins

So the answer is option D - Active transport, carrier transporter

Passive transport is the movement of molecules from high concentration to low concentration and this process does not require energy. So option A is incorrect

Simple diffusion is the process in which substances move from a high concentration area to a low concentration area. In simple diffusion, energy is not needed. So option B is incorrect

Transport is active transport but the process requires carrier protein transporter. Channel proteins transport ions along their concentration gradient. Channel proteins cannot transport ions from low concentration to high concentration. So option C is incorrect