Q1. Which of the following is NOT a component of the Electron Transport System?A. Cytochrome cB. UbiquinoneC. ATP synthaseD. Ribosomes
Q2. Which step of aerobic respiration releases the largest amount of ATP?A. GlycolysisB. Krebs cycleC. Electron Transport ChainD. Fermentation
Q3. Which of the following is INCORRECT about the Electron Transport Chain?A. It takes place in the inner mitochondrial membrane.B. Oxygen is the final electron acceptor.C. It generates ATP through substrate-level phosphorylation.D. It creates a proton gradient across the membrane.
Q4. Which of the following statements about oxidative phosphorylation is CORRECT?A. It occurs in the cytoplasm.B. It produces ATP using a proton gradient.C. It does not require oxygen.D. It occurs before the Krebs cycle.
Q5. Which of the following molecules is regenerated at the end of the Krebs cycle?A. Citric acidB. Oxaloacetic acidC. Acetyl-CoAD. Fumaric acid
Q6. Which type of phosphorylation occurs in the Electron Transport Chain?A. Substrate-level phosphorylationB. Oxidative phosphorylationC. PhotophosphorylationD. Fermentative phosphorylation
Q7. Which molecule acts as the final electron acceptor in anaerobic respiration?A. OxygenB. Carbon dioxideC. PyruvateD. Water
Q8. Which of the following statements about the Krebs cycle is CORRECT?A. It directly produces glucose.B. It generates both NADH and FADH₂.C. It takes place in the cytoplasm.D. It does not release carbon dioxide.
Q9. Which of the following is INCORRECT about substrate-level phosphorylation?A. It occurs in glycolysis.B. It occurs in the Krebs cycle.C. It requires the Electron Transport Chain.D. It directly produces ATP from ADP.
Q10. Which of the following is CORRECT about the respiratory quotient (RQ)?A. RQ for carbohydrates is 1.B. RQ for fats is greater than 1.C. RQ for proteins is exactly 2.D. RQ is independent of the type of respiratory substrate.