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Multiple Choice
What occurs when the bond between the second and third phosphate groups in ATP is broken?
A
Energy is absorbed and ADP is formed.
B
Energy is absorbed and AMP is formed.
C
Energy is released and ADP is formed.
D
Energy is released and AMP is formed.
Verified step by step guidance
1
Identify the structure of ATP (adenosine triphosphate), which consists of an adenosine molecule bonded to three phosphate groups.
Understand that the bonds between the phosphate groups in ATP are high-energy bonds, particularly the bond between the second and third phosphate groups.
Recognize that when the bond between the second and third phosphate groups is broken, a phosphate group is removed, converting ATP to ADP (adenosine diphosphate).
Note that the breaking of this bond is an exergonic reaction, meaning it releases energy.
Conclude that the correct description of this process is that energy is released and ADP is formed.