Why is ATP an important molecule in metabolism?
A) Its hydrolysis provides an input of free energy for exergonic reactions.
B) It provides energy coupling between exergonic and endergonic reactions.
C) Its terminal phosphate group contains a strong covalent bond that, when hydrolyzed, releases free energy.
D) Its terminal phosphate bond has higher energy than the other two.
E) It is one of the four building blocks for DNA synthesis.

Question

Quizplus · Accepted Answer

ATP is important in metabolism because it provides energy coupling between exergonic (energy-releasing) and endergonic (energy-absorbing) reactions. The hydrolysis of ATP releases energy that can be used to drive endergonic reactions. This process is important in many cellular processes, including muscle contraction, nerve impulse transmission, and synthesis of biomolecules like proteins and nucleic acids.

Why Is ATP an Important Molecule in Metabolism