Which statement correctly describes what proteins, lipids, and glycogen have in common?

Proteins, lipids, and glycogen can all be broken down through metabolic processes that help cells produce ATP, their usable energy molecule. They are not all primary energy sources during exercise, and they are not all stored in the liver: lipids are stored mainly in fat tissue, while glycogen is stored in the liver and muscles. They also do not contain the same amount of ATP.

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