Biochemistry MCQ Quiz Hub

Biochemistry MCQS PAPER SET 4

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1. Which of the following is not a significant biological oxidizing agent?




2. How many CO2 molecules are exhaled for each O2 molecule utilized in cellular respiration?




3. What happens after glycolysis when oxygen is available as an electron acceptor?




4. Lactic acid is produced by human muscles during strenuous exercise because of lack of




5. Which of the following is correct sequence of processes in the oxidation of glucose?




6. In electron transport, electrons ultimately pass to




7. The complete oxidation of glucose yields usable energy in the form of




8. During electron transport, protons are pumped out of the mitochondrion at each of the major sites except for




9. The aerobic breakdown of glucose known as respiration involves




10. In aerobic respiration, the compound that enters a mitochondrion is




11. How many molecules of ATP are hydrolysed to form two molecule of ammonia?




12. The nitrogen atoms of urea produced in the urea cycle are derived from




13. The products of urea cycle are




14. Nitrate reduction can be carried out by




15. Which of the following is used as carbon atom source while producing urea in the urea cycle?




16. Which of the following amino acid do not fall under the category of essential amino acid?




17. Urea cycle converts




18. The inputs to one cycle of the urea cycle are




19. The symptoms of retinol excess are




20. Main function of insulin hormone is to




21. Ascorbic acid acts as an




22. A deficiency of thiamin produces the disease known as




23. Acyl carrier protein (ACP) plays an important role in the biosynthesis




24. Vitamin B12 (Cobalamin) is only synthesized by




25. Which of the following are reduced coenzymes?




26. The absence of ascorbic acid in the human diet gives rise to




27. Vitamins are essential because the organism




28. The prosthetic group biotin is a carrier of which type of molecule?




29. Lipoic acid exists in




30. Vitamin B12 is useful in the prevention and treatment of




31. An example of a digestive hormone is




32. In the co-enzyme B12the position occupied by a cyanide ion in vitamin B12 is bonded directly to the __________ of the ribose of adenosine.




33. The reductant, NADH, transfers the electrons via a flavo-proteins to the specific disulfide (S-S) protein to form a dithiol (SH,SH) protein which converts vitamin




34. An early sign of retinol deficiencies in man is




35. An enzyme, L-folate reductase reduces folic acid to




36. What compound of raw egg white causes a syndrome similar to vitamin B deficiency?




37. The disease Beriberi is due to a dietary deficiency in




38. Which of these is a symptom of vitamin A deficiency?




39. Vitamin-C is considered as a




40. The vitamin niacin is part of the __________ molecule.




41. Which of these hormones is a catecholamine?




42. Dihydroorotate dehydrogenase contains




43. E.coli ACP has its molecular weight as around




44. The vitamin riboflavin is part of the __________ molecule.




45. The most prominent role that tocopherol has in in-vitro systems is as a strong




46. Biotin occurs mainly in combined forms bound to protein through




47. Lipoic acid is a co-factor of the




48. β-carotene together with α-carotene, γ-carotene and cryptoxanthine are synthesized by




49. Vitamin-D deficiency can cause




50. The most prominent role that tocopherol has in in-vitro systems is as a strong




51. Biotin occurs mainly in combined forms bound to protein through




52. Lipoic acid is a co-factor of the




53. β-carotene together with α-carotene, γ-carotene and cryptoxanthine are synthesized by




54. A deficiency of Vitamin K results in a decreased level of




55. The vitamin riboflavin, which occurs as a yellow pigment in egg yolk and milk become




56. Which of the following compounds/(s) belong/(s) to the vitamin B6 group?




57. What metal ion is specifically bound by vitamin B12?




58. A fat-soluble vitamin that regulates blood clotting is




59. Which of these is a vitamin A precursor?




60. In one iron-metalloflavoprotein, the iron is present as a




61. Vitamin K1 was first isolated from alfalalfa and has the phytyl side chain consisting of




62. Which of these molecules is vitamin H?




63. The occurrence of metals such as iron or molybdenum in some flavoproteins can




64. Models of end-linked Osaka VI Fibrinogen dimers, a bilayer dimer is linked at




65. A deficiency of niacin causes




66. Selenium is an essential component of the enzyme glutathione peroxidase which




67. Who discovered vitamin C (ascorbic acid)?




68. Molar absorbtivities of compounds exhibiting charge transfer absorption are