16
QuizMultiple Choice

Photosynthesis and Respiration — Test

Question 16 • 26-27 - C - RUSD Biology in the Living Earth

Which statement correctly compares the body’s energy storage molecules?

Answer
A
Lipids are the body’s main source of energy, but glycogen contains most of the body’s stored energy.
B
Glycogen is the body’s main source of energy, but lipids contain most of the body’s stored energy.
C
Glycogen is the body’s main source of energy, but proteins contain most of the body’s stored energy.
D
Proteins are the body’s main source of energy, but lipids contain most of the body’s stored energy.

Explanation

Glycogen is the stored form of glucose and can be broken down to provide readily available energy. Lipids (fats) store far more energy overall because they provide more energy per gram and the body stores much larger reserves of fat than glycogen. Therefore, glycogen is the main readily available energy source, while lipids contain most of the body’s stored energy.

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