Question

question 3
energy for active transport is most commonly provided directly by ____.
a water
b atp
c phosphate
d glucose

Explanation:

Active transport moves substances against their concentration gradient. ATP (adenosine - triphosphate) is the cell's energy - currency molecule. Hydrolysis of ATP releases energy that can be directly used to power active transport processes. Water is a solvent and not an energy source for active transport. Phosphate is a part of ATP but not the direct energy source on its own. Glucose needs to be metabolized first to generate ATP before its energy can be used for active transport.

Answer:

B. ATP