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Multiple Choice
ATP releases energy when a bond is broken between which of the following?
A
The second and third phosphate groups
B
The first and second phosphate groups
C
The adenine and ribose
D
The ribose and the first phosphate group
Verified step by step guidance
1
Understand the structure of ATP (Adenosine Triphosphate), which consists of adenine, ribose (a sugar), and three phosphate groups labeled as alpha (α), beta (β), and gamma (γ).
Recognize that ATP is known for its role in energy transfer within cells, primarily through the breaking of bonds between its phosphate groups.
Identify that the bond between the second (β) and third (γ) phosphate groups is a high-energy bond, often referred to as a phosphoanhydride bond.
When this bond is hydrolyzed (broken by the addition of water), ATP is converted to ADP (Adenosine Diphosphate) and an inorganic phosphate (Pi), releasing energy that can be used by the cell.
Conclude that the energy release upon breaking the bond between the second and third phosphate groups is a key aspect of ATP's role in cellular processes.