To do biological (1) __________________________ , cells require energy. a quick source of energy that cells use is the molecule (2) __________________________ . the (3) __________________ in this molecule is stored in its (4) __________________________ . atp is composed of a(n) (5) __________________________ molecule bonded to a(n) (6) ___________________________ sugar. three (7) __________________________ molecules called (8) ______
