Question

unit 2 exam 2025 - 26
energy is released from atp when

• a phosphate group is added.
• adenine bonds to ribose.
• atp is exposed to sunlight.
• a phosphate group is removed.

Explanation:

ATP (adenosine - tri - phosphate) has high - energy phosphate bonds. When a phosphate group is removed through hydrolysis, energy is released, forming ADP (adenosine - di - phosphate) and an inorganic phosphate. Adding a phosphate group to ADP requires energy input to form ATP. Adenine bonding to ribose forms adenosine, not related to ATP energy release. Exposure of ATP to sunlight is not a mechanism for energy release from ATP.

Answer:

a phosphate group is removed.