Q1. Which compound is formed when oxygen acts as the final electron acceptor in respiration?A. Carbon dioxideB. WaterC. ATPD. NADH
Q2. During which step of aerobic respiration is CO₂ first released?A. GlycolysisB. Krebs cycleC. Oxidation of pyruvateD. Electron Transport Chain
Q3. Which of the following is CORRECT about the Electron Transport Chain (ETC)?A. It occurs in the cytoplasm.B. It generates ATP through substrate-level phosphorylation.C. Oxygen is the final electron acceptor.D. It does not involve a proton gradient.
Q4. Which of the following statements about the respiratory quotient (RQ) is correct?A. RQ for carbohydrates is greater than 1B. RQ for proteins is exactly 1C. RQ for fats is less than 1D. RQ for all substrates is always the same
Q5. Which of the following is CORRECT about aerobic respiration?A. It requires oxygen.B. It occurs only in prokaryotic cells.C. It does not involve the Electron Transport Chain.D. It produces less ATP than anaerobic respiration.
Q6. Which enzyme is responsible for splitting fructose-1,6-bisphosphate into two three-carbon molecules during glycolysis?A. HexokinaseB. AldolaseC. PhosphofructokinaseD. Enolase
Q7. Which process in respiration produces the highest number of NADH molecules?A. GlycolysisB. Krebs cycleC. FermentationD. Electron Transport Chain
Q8. Which intermediate of the Krebs cycle is involved in the synthesis of amino acids?A. Citric acidB. α-Ketoglutaric acidC. Succinic acidD. Fumaric acid
Q9. Which of the following is CORRECT about substrate-level phosphorylation?A. It requires the Electron Transport Chain.B. It occurs in glycolysis and the Krebs cycle.C. It takes place in the inner mitochondrial membrane.D. It produces more ATP than oxidative phosphorylation.
Q10. Which of the following statements about fermentation is CORRECT?A. It takes place in the mitochondria.B. It produces more ATP than aerobic respiration.C. It occurs under anaerobic conditions.D. Oxygen is required for fermentation to proceed.