Question

question 34
1 pts
for which of the following jobs is active transport most responsible?
○ rapid movement of molecules in a solution
○ movement of molecules into or out of a cell against a concentration gradient
○ osmosis
○ movement of molecules into or out of a cell along a concentration gradient
○ diffusion of molecules within a cell

Explanation:

Active transport is the movement of molecules across a cell membrane from an area of lower concentration to an area of higher concentration (against the concentration gradient) using energy. Diffusion and osmosis are passive - transport processes that occur along the concentration gradient. Movement of molecules in a solution rapidly is not related to active transport. Diffusion within a cell is also a passive process.

Answer:

Movement of molecules into or out of a cell against a concentration gradient