A. ATP consumes energy from another metabolic reaction.
B. ADP often transfers a phosphate to the reactant.
C. The metabolic reaction requires energy from ATP.D. ATP gains a phosphate group.
E. ADP is used up in the metabolic reaction.
2 Answers
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C. ATP hydrolysis is often the coupling reaction of choice when it comes to providing energy for otherwise unfavorable reactions.
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Definition of coupled reaction :
A chemical reaction having a common intermediate in which energy is transfered from one side of the reaction to the other.
Examples:
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The formation of ATP is endergonic and is coupled to the dissipation of a proton gradient.
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ATP + glucose -> ADP + glucose-1-phosphate and glucose-1-phosphate + fructose -> sucrose + phosphate
– a molecule of sucrose is synthesized from glucose and fructose at the expense of the energy stored in ATP and transfered by glucose-1-phosphate
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