Which statement correctly describes what proteins, lipids, and glycogen have in common? a. They are all used as primary energy sources during exercise. b. They are each stored in the liver to be used as a ready energy reserve. c. They each can be broken down to provide ATP to cells. d. They each contain the same amount of ATP.

The statement that correctly describes what proteins, lipids, and glycogen have in common is C. they each can be broken down to provide ATP to cells. Proteins, lipids, and glycogen all consist of a group of molecules, which means they can be broken down to these smallest items. ATP, or adenosine triphosphate, is a molecule that can be found in anything, and which we need for everything because it is a source of energy in living beings.