Question

Identify the pair that is selective and specific in mode of transport
(A) Facilitated diffusion and active transport
(B) Simple diffusion and facilitated diffusion
(C) Active transport and simple diffusion
(D) Passive transport and active transport​

Answer 1

The pair that is  selective and specific in mode of transport is (A) Facilitated diffusion and active transport.

• The process of facilitated diffusion can be described as a process through which materials move across the cell membrane through specific transmembrane proteins. Without these specific carrier molecules, facilitated diffusion will not occur hence such kind of transport is selective and specific.
• Specific molecules enter a cell via active transport as active transport is the movement of molecules from a lower concentration to a higher concentration against the concentration gradient. Only specific molecules will transport across the cell via active transport.

Hence, the correct option is A) Facilitated diffusion and active transport.

Answer 2

Explanation:

(A) Facilitated diffusion and active transport