Question

homework - atp and adp
examine the molecule.
what must be added to this molecule to create atp?
an adenine nucleotide
a deoxyribose sugar
a phosphate group
a ribose sugar

Explanation:

ATP (adenosine tri - phosphate) has three phosphate groups. ADP (adenosine diphosphate) has two phosphate groups. To convert ADP to ATP, a phosphate group must be added through a process called phosphorylation.

Answer:

C. a phosphate group