Which of the following membrane activities requires energy from ATP hydrolysis?
A) facilitated diffusion of chloride ions across the membrane through a chloride channel
B) movement of Na+ ions from a lower concentration in a mammalian cell to a higher concentration in the extracellular fluid
C) movement of glucose molecules into a bacterial cell from a medium containing a higher concentration of glucose than inside the cell
D) movement of carbon dioxide out of a paramecium

Question

Quizplus · Accepted Answer

The movement of Na+ ions from a lower concentration inside a mammalian cell to a higher concentration in the extracellular fluid is an example of active transport, which requires energy from ATP hydrolysis. This process is typically carried out by the sodium-potassium pump, a type of active transport mechanism that moves ions against their concentration gradient.

Which of the Following Membrane Activities Requires Energy from ATP