Synthesis of macromolecules such as starch, proteins, and dna are coupled to atp hydrolysis. however, one atp molecule can supply only a fraction of the energy needed to synthesize one of these macromolecules. which statement best describes how the small amount of energy provided by atp can be used to accomplish this synthesis demand?

(a) very few macromolecules must be synthesized within a cell, allowing the available atp to be sufficient for driving their synthesis
(b) many atp molecules are used at one time to achieve the synthesis of a single macromolecule
(c) the synthesis reactions are carried out very slowly, which reduces the amount of energy needed to complete them
(d) the macromolecules are synthesized in many small steps, each of which can be achieved with the energy provided by one atp molecule.
(e) enzymes are used by the cell to lower the amount of energy needed to carry out the synthesis of macromolecules, thus reducing the number of atp molecules needed