Biochemistry MCQ Quiz Hub

Biochemistry MCQS PAPER SET 7

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1. Important function of cholesterol is to




2. To stop ATP synthesis which chemical is generally used?




3. The enzymes of the TCA cycle in a eukaryotic cell are located in the




4. Citric acid cycle occurs in




5. Most multi-cellular organisms obtain energy for the synthesis of ATP during oxidative phosphorylation from




6. Standard redox potential for a substance is measured under standard condition and is expressed as




7. Most of the enzymes of the citric acid cycle in a eukaryotic cell are located in the




8. A positive redox potential means substance has




9. The end product of glycolysis is pyruvate, which enters the citric acid cycle after being converted to




10. Energy that is released from glucose during respiration but not transferred to ATP bonds can be detected as




11. Which of the following is involved in energy production?




12. Which of the following enzyme does not take part in the TCA cycle?




13. The first intermediate in TCA cycle is




14. Cholesterol can be synthesized de novo in




15. Which one of the following is not the intermediate of Kreb's cycle?




16. Which one is not the main protein in electron transport chain?




17. The FADH2 and NADH produced by the oxidation of one acetyl-CoA results in the synthesis of about-




18. In eukaryotes, electron transport occurs in




19. The catabolism of sugars and fatty acids is similar because




20. Which of the following is the reduced form of a temporary electron carrier molecule?




21. Which one of the following is a product of both cyclic and noncyclic photophosphorylation?




22. Which of the following represents a correct ordering of the events that occur during the respiration of glucose in the absence of O2?




23. The rate of photorespiration in most plants increases at.higher temperatures. Some plants have evolved a somewhat round-about system to deal with this problem. This series of reactions is called




24. NADP+ is reduced to NADPH during




25. More ATP is manufactured during __________ than at any other time in all of cellular metabolism.




26. Electron transport systems play a vital role in




27. Antenna complexes, electron transport chains, and carbon fixation are all found in




28. Where does the O2 come from that is essential for the proper functioning of oxidative phosphorylation?




29. Carbon fixation requires the expenditure of ATP molecules which is generated by




30. A cyclic electron transport process is the characteristic of




31. In oxygenic photosynthesis, the electron donor is




32. The followings are the products of the light reactions of photosynthesis except




33. The vast majority of the molecules that act as energy carriers to power cellular activities are made in




34. Which of the following statements about energy metabolism is false?




35. In cells having organelles, the steps of the Krebs cycle and the electron transport system occur in the




36. As a result of the photosynthetic process, which product is formed?




37. A eukaryotic cell that can carry out only fermentation instead of the complete aerobic respiration of glucose




38. What is the maximum absorption wavelength for photosystem I in green plants?




39. Carbon dioxide is reduced in




40. During the light-dependent reactions of photosynthesis, which of the following does not occur?




41. Which of the following structures or processes are logically associated with chloroplasts?




42. In oxygenic photosynthesis, water is split in order to provide the




43. Where do the protons come from that make up the proton gradient used in the light reactions of photosynthesis?




44. Oxidative phosphorylation is to respiration as __________ is to photosynthesis




45. Which of the following serves as a reactant in photosynthesis and a product in cellular respiration?




46. Hydrogen (electron) acceptor in the light reactions is




47. The cytochrome c oxidase complex




48. In the Calvin cycle, carbon dioxide is fixed in a reaction with the




49. What do NAD+, NADP+, and FAD+ all have in common?




50. In noncyclic photophosphorylation, the ultimate acceptor of electrons that have been produced from the splitting of water is




51. The breakdown of glucose occurs by the process known as




52. The manufacture of ATP in both photosynthesis and respiration is made possible by




53. The end products of noncyclic photophosphorylation are




54. In algae, photosynthesis takes place in




55. Which enzyme is involved in carbon-fixation reaction?




56. Assume the combined processes of photosynthesis and cellular respiration, the electrons that start as part of H2O at the beginning of the light reactions end up attaching to




57. In the initial step of photosynthesis, sunlight energizes the electron pair of




58. Rubisco (RuBP Carboxylase-oxygenase enzyme), glyceraldehyde 3-phosphate, and NADPH all play a role in




59. The electrons that are released by the splitting of water during photosynthesis ultimately end up in




60. Glycolysis takes places in the __________ and produces __________ , which in the presence of oxygen then enters the __________ .




61. What process in cellular respiration is essentially the reverse of carbon fixation in photosynthesis?




62. What do coenzyme A, CO2, oxaloacetate, and FADH2 all have in common?




63. If the oxygen is labeled in CO2 and provide this CO2 to a plant, where it is expected to find this labeled oxygen after the plant had undergone photosynthesis?




64. Histidine is degraded to α-ketoglutarate and is described as a




65. Which of the following amino acids is considered as both ketogenic and glucogenic?




66. A glucogenic amino acid is one which is degraded to




67. Which of the following is the best described glucogenic amino acid?




68. A person with phenylketonuria cannot convert




69. Oxidative deamination is the conversion of an amino