Bioenergetics – MCQs

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1. Bioenergetics is the study of:





2. The main energy currency of the cell is:





3. ATP contains how many phosphate groups?





4. Hydrolysis of ATP to ADP is:





5. The standard free energy change (Ξ”G°’) of ATP hydrolysis is approximately:





6. The chemiosmotic theory was proposed by:





7. In mitochondria, ATP synthesis is driven by:





8. The enzyme responsible for ATP synthesis is:





9. The main site of oxidative phosphorylation is:





10. Glycolysis occurs in the:





11. The Krebs cycle takes place in the:





12. The net ATP yield from glycolysis per glucose molecule is:





13. The net ATP yield from complete oxidation of one glucose molecule is about:





14. NADH generated in the Krebs cycle donates electrons to:





15. FADH2 donates electrons to:





16. The final electron acceptor in the mitochondrial electron transport chain is:





17. Oxidative phosphorylation is coupled to:





18. In photosynthesis, ATP is synthesized in:





19. The light-dependent reactions of photosynthesis generate:





20. The Calvin cycle is also called the:





21. Substrate-level phosphorylation occurs in:





22. Uncouplers of oxidative phosphorylation:





23. The main uncoupling protein in brown adipose tissue is:





24. Photophosphorylation in plants is analogous to:





25. Cytochrome c is located in:





26. The P/O ratio represents:





27. The standard redox potential (E°’) indicates:





28. Anaerobic glycolysis results in the production of:





29. The enzyme hexokinase catalyzes:





30. The enzyme phosphofructokinase (PFK) regulates:





31. The Pasteur effect describes:





32. Which high-energy compound is an intermediate in glycolysis?





33. In oxidative phosphorylation, ATP yield per NADH is approximately:





34. In oxidative phosphorylation, ATP yield per FADH2 is approximately:





35. Chemiosmotic coupling involves:





36. The main metabolic fuel for the brain under normal conditions is:





37. During prolonged fasting, the brain can also use:





38. Fermentation allows ATP production without:





39. The enzyme lactate dehydrogenase catalyzes:





40. The Warburg effect describes:





41. ATP can also be produced in the cytoplasm by:





42. NADH shuttles (e.g., malate-aspartate shuttle) are needed to:





43. The Cori cycle connects:





44. Photophosphorylation in plants involves:





45. Cyclic photophosphorylation produces:





46. Non-cyclic photophosphorylation produces:





47. The proton motive force has two components:





48. Oxidative phosphorylation is inhibited by:





49. The enzyme complex that produces water in mitochondria is:





50. Bioenergetics combines principles of: