Q1. Which step of cellular respiration generates carbon dioxide?A. GlycolysisB. FermentationC. Krebs cycleD. Electron Transport Chain
Q2. What is the total net ATP gain from one molecule of glucose in aerobic respiration?A. 2 ATPB. 4 ATPC. 32 ATPD. 38 ATP
Q3. Which of the following statements about the link reaction is CORRECT?A. It converts pyruvate into Acetyl-CoA.B. It produces glucose from pyruvate.C. It occurs in the cytoplasm.D. It does not release carbon dioxide.
Q4. Which of the following is NOT a feature of the Electron Transport Chain?A. Takes place in the inner mitochondrial membraneB. Uses oxygen as the final electron acceptorC. Produces ATP through oxidative phosphorylationD. Directly produces glucose
Q5. What is the function of ATP synthase in the Electron Transport Chain?A. Transfers electrons to oxygenB. Pumps protons across the membraneC. Synthesizes ATP using proton gradientD. Reduces NAD⁺ to NADH
Q6. Which component of the Electron Transport Chain directly transfers electrons to oxygen?A. Cytochrome cB. Complex IIIC. Complex IVD. ATP Synthase
Q7. Which enzyme converts pyruvate into Acetyl-CoA before entering the Krebs cycle?A. Pyruvate kinaseB. HexokinaseC. Pyruvate dehydrogenaseD. Enolase
Q8. Which of the following is a product of fermentation in muscle cells?A. EthanolB. Carbon dioxideC. Lactic acidD. Acetyl-CoA
Q9. Which of the following statements about anaerobic respiration is INCORRECT?A. It occurs in some prokaryotic organisms.B. It generates less ATP than aerobic respiration.C. It requires oxygen to proceed.D. It produces ethanol or lactic acid as byproducts.
Q10. Which enzyme catalyzes the conversion of succinate to fumarate in the Krebs cycle?A. FumaraseB. Succinate dehydrogenaseC. AconitaseD. Malate dehydrogenase