Question

is the passage of a substance from its lower to higher concentration, using energy from the cell.

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

Answer 1

The correct option is D Active transport

In active transport the cell expends energy, in the form of ATP, to move a substance against its concentration gradient, that is, from its region of lower concentration to a region of higher concentration. Active transport usually happens across the cell or organellar membranes.