Which of the following statements describes a central role t

Which of the following statements describes a central role that ATP plays in cellular metabolism?

A. Its terminal phosphate bond is stronger than most covalent bonds in other biological macromolecules.

B. Hydrolysis of ATP provides an input of free energy for exergonic reactions.

C. Hydrolysis of the terminal phosphate group stores free energy that is used for cellular work.

D. ATP provides energy coupling between exergonic and endergonic reactions.

Solution

D. ATP provides energy coupling between exergonic and endergonic reactions.

ATP hydrolysis releases energy. This reaction can then be coupled with thermodynamically unfavorable reactions to give an overall negative (spontaneous) G for the reaction sequence.