AP Biology : Cellular energetics

Study concepts, example questions & explanations for AP Biology

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Example Questions

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Example Question #1 : Understand Structure And Importance Of Atp

Which cellular process produces ATP?

Possible Answers:

Cellular respiration

mitosis

Na+/K+ pump

DNA synthesis

Correct answer:

Cellular respiration

Explanation:

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

Example Question #6 : Understand Structure And Importance Of Atp

What is the primary energy currency for cells?

Possible Answers:

carbohydrate

GTP

oxygen

ATP

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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