Question

Which of the following process requires ATP to facilitate movement of the solute molecules against their concentration gradient?

• A. Diffusion
• B. Osmosis
• C. Imbibition
• D. Active transport

Answer 1

The correct option is D Active transport

Active transport utilises energy to pump molecules against a concentration gradient, i.e, from a region of lower concentration to the region of higher concentration.​

This process requires energy that is supplied by the cell in the form of ATP. Active transport is carried out by membrane bound proteins. These proteins use the energy to carry substance across the cell membrane.