Free Cellular Respiration MCQs with Answers

182 Cellular Respiration MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.

Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.

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182 questions · page 10 of 10

  • A. 6 kcal
  • B. 9 kcal
  • C. 8 kcal
  • D. 7 kcal

Explanation: When an ATP molecule is hydrolyzed into ADP and P, it undergoes a chemical reaction that releases about 7 kilocalories (kcal) of energy.

Correct answer: 7 kcal
  • A. Glycolysis
  • B. Kreb's cycle
  • C. Synthesizes of acetyl Co-A
  • D. Electron transport chain

Explanation: Glycolysis is the metabolic pathway that is common to both fermentation and cellular respiration.

Correct answer: Glycolysis