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Cell Respiration · Paper 1 — Free Biology HL Practice Questions
1FoundationMCQRole of mitochondria in energy production1 markPaper 1~2 min
A student investigates ATP production in yeast cells under aerobic and anaerobic conditions. After 30 minutes, ATP concentration is significantly higher in the aerobic condition. Which of the following best explains this difference?
Solutions
2FoundationMCQRole of mitochondria in energy production1 markPaper 1~2 min
A researcher treats a culture of human muscle cells with a chemical that completely inhibits phosphofructokinase (PFK), a regulatory enzyme that catalyses a committed step in glycolysis. The cells are maintained in a glucose-rich, aerobic medium. Which of the following is the most likely immediate consequence?
Solutions
3MasteryMCQGlycolysis, Krebs cycle, and oxidative phosphorylation1 markPaper 1~2 min
Succinate dehydrogenase is inhibited by a drug in human muscle cells undergoing aerobic respiration. All steps of cellular respiration up to and including the inhibited reaction proceed normally. How many ATP molecules per glucose are produced by substrate-level phosphorylation only under these conditions?
Solutions
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