AP Biology: Cellular Respiration
Cellular respiration is the pathway the AP Biology exam keeps returning to, and the one students most often half-remember. This quiz walks the whole sequence — glycolysis, pyruvate oxidation, the Krebs cycle, and oxidative phosphorylation.
Questions cover where each stage happens, what goes in and what comes out, and how the electron transport chain turns a proton gradient into ATP. The arithmetic of ATP yield gets its own attention, because that is where marks are lost.
If you can explain why the cycle stalls without oxygen, you are in good shape. If not, this is a useful hour.
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Sample questions3 of 13 shown
Q1
During glycolysis, glucose (a 6-carbon molecule) is split into two molecules of pyruvate (3-carbon molecules). How many ATP molecules are produced directly during glycolysis?
Q2
Which of the following is the primary function of the Krebs cycle (citric acid cycle)?
Q3
What is the role of NAD+ and FAD in cellular respiration?
What This Quiz Covers
- Glycolysis and its net ATP yield
- Pyruvate oxidation and the link reaction
- The Krebs cycle and its electron carriers
- The electron transport chain and chemiosmosis
- Total ATP accounting per glucose
- Anaerobic respiration and fermentation
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