AP Environmental Science : Cellular Respiration

Study concepts, example questions & explanations for AP Environmental Science

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Example Questions

Example Question #5 : Energy And Biochemical Cycles

In cellular respiration,

Possible Answers:

glucose is oxidized to produce energy and carbon dioxide

carbon dioxide is synthesized from water and carbon dioxide

none of these

oxygen is produced as a waste

organisms breathe oxygen in and carbon dioxide out

Correct answer:

glucose is oxidized to produce energy and carbon dioxide


In cellular respiration, glucose and oxygen are used to produce energy, as well as carbon dioxide and water as wastes. Cellular respiration is essentially the opposite of photosynthesis. Do not confuse cellular respiration with respiration (breathing), which is the physiological process of taking air in to receive oxygen, and breathing air out to expel excess carbon dioxide produced during cellular respiration.

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