Which of the following statements about atp is false?
a. its energy is captured in high-energy hydrogen bonds.
b. it is a modified nucleotide.
c. it provides the energy needed to drive energy-absorbing chemical reactions.
d. it activates contractile proteins in muscle cells so that cells can shorten and perform mechanical work.
e. it drives the transport of certain solutes (e. g., amino acids) across cell membranes.