AP Biology : Cellular energetics

Study concepts, example questions & explanations for AP Biology

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Example Questions

Example Question #11 : Cellular Energetics

Which cellular process produces ATP?

Possible Answers:

Na+/K+ pump

Cellular respiration

DNA synthesis

mitosis

Correct answer:

Cellular respiration

Explanation:

Cellular respiration is the process through which ATP is produced through the oxidation of glucose.

Example Question #11 : Cellular Energetics

What is the primary energy currency for cells?

Possible Answers:

oxygen

ATP

carbohydrate

GTP

Correct answer:

ATP

Explanation:

 ATP is the primary energy currency for cells. The phosphoanhydride bonds of ATP, or the bonds between phosphate molecules, are high energy. This is due to the close proximity of positively charged phosphate and negatively charged oxygen; these charges repel. Also, there is resonance stabilization of the products of ATP hydrolysis (ADP and Pi); thus ADP is more stable than ATP. Carbohydrates are broken down during glycolysis to produce ATP. 

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