Question

Which one of the following processes requires an input of energy?
A)active transport
B)diffusion
C)facilitated diffusion
D)osmosis​

Answer 1

Answer:

An input of energy is required in the process of active transport as it involves the movement of ions or molecules across a cell membrane from low to a high concentration. The movement requires energy to maintain the electrochemical gradient.

So, the correct option is 'Active transport'.