Question

Which of the following means of transmembrane transport involves the expenditure of energy by the cell and can move materials up a concentration gradient?

• A. Osmosis
• B. Facilitated diffusion
• C. Simple diffusion
• D. Active transport

Answer 1

Answer: (D)

Active transport

In one form of transport across the cell membrane, ATP is utilized. The utilization of an ATP molecule provides the cell with an energy boost which enables the transport of different molecules across the cell membrane. This is termed as active transport of molecules across the cell membrane.

So, the correct answer is 'Active transport'.