ADP is the molecule that ATP becomes when it gives up one of its three phosphate groups.

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Multiple Choice

ADP is the molecule that ATP becomes when it gives up one of its three phosphate groups.

Explanation:
ATP stores energy in its three phosphate groups, and when one phosphate is removed through hydrolysis, it becomes ADP (adenosine diphosphate) plus inorganic phosphate. This change is exactly what happens when ATP powers cellular work—the energy is released by breaking that outer phosphate bond, leaving ADP. If two phosphates were removed, you’d get AMP, and ATP would be the starting molecule, not the product. NADP+ is a different molecule involved in other reactions, not produced by ATP’s hydrolysis.

ATP stores energy in its three phosphate groups, and when one phosphate is removed through hydrolysis, it becomes ADP (adenosine diphosphate) plus inorganic phosphate. This change is exactly what happens when ATP powers cellular work—the energy is released by breaking that outer phosphate bond, leaving ADP. If two phosphates were removed, you’d get AMP, and ATP would be the starting molecule, not the product. NADP+ is a different molecule involved in other reactions, not produced by ATP’s hydrolysis.

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