Carbohydrates

1. What is the final product of carbohydrate metabolism?

   • a) Glucose

   • b) Fructose

   • c) Pyruvate

   • d) Acetyl CoA

2. 2)Which enzyme catalyzes the reaction in which glucose is converted to glucose-6-phosphate?

   • a) Phosphofructokinase

   • b) Glucokinase

   • c) Hexokinase

   • d) Glucose-6-phosphatase

3. 3)Which enzymes catalyzes the conversion of glucose-6-phosphate to fructose-6-phosphate?

   • a) Phosphofructokinase

   • b) Glucokinase

   • c) Hexokinase

   • d) Phosphohexose isomerase

4. 4)What is the first step of glycolysis?

   • a) Glucose-6-phosphate to fructose-6-phosphate

   • b) Phosphorylation of glucose

   • c) Conversion of glucose to glucose-6-phosphate

   • d) Cleavage of fructose-6-phosphate

5. 5)What is the end product of glycolysis?

   • a) Pyruvate

   • b) Glucose-6-phosphate

   • c) Fructose-6-phosphate

   • d) Acetyl CoA

6. 6)What is the process that converts pyruvate to acetyl-CoA?

   • a) Pyruvate Dehydrogenase

   • b) Pyruvate Kinase

   • c) Pyruvate carboxylase

   • d) Pyruvate decarboxylase

7. 7)What are the products of citric acid cycle?

   • a) CO2 and ATP

   • b) CO2 and NADH

   • c) CO2 and FADH2

   • d) CO2 and GTP

8. 8)Which enzyme catalyzes the conversion of glucose to ethanol in alcoholic fermentation?

   • a) Pyruvate dehydrogenase

   • b) Pyruvate kinase

   • c) Alcohol dehydrogenase

   • d) Acetaldehyde dehydrogenase

9. 9)What is the enzyme responsible for the conversion of glucose-6-phosphate to glucose-1-phosphate

   • a) Phosphohexose isomerase

   • b) Glucose-6-phosphatase

   • c) Phosphoglucomutase

   • d) Phosphofructokinase

10. 10)What is the enzyme responsible for the conversion of glycogen to glucose-1-phosphate?

    • a) Phosphorylase

    • b) Debranching enzyme

    • c) Phosphofructokinase

    • d) Phosphoglucomutase

answers

10. • 1. c) Pyruvate

      2. c) Hexokinase

      3. d) Phosphohexose isomerase

      4. c) Conversion of glucose to glucose-6-phosphate

      5. a) Pyruvate

      6. a) Pyruvate Dehydrogenase

      7. c) CO2 and FADH2

      8. c) Alcohol dehydrogenase

      9. c) Phosphoglucomutase

      10. a) Phosphorylase

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11. 11)What is the main function of the enzyme hexokinase in carbohydrate metabolism?

12. a) Conversion of glucose to glucose-6-phosphate

13. b) Conversion of glucose-6-phosphate to fructose-6-phosphate

14. c) Conversion of pyruvate to acetyl-CoA

15. d) Cleavage of glycogen to glucose-1-phosphate

16. 12)What is the main function of the enzyme glycogen phosphorylase in carbohydrate metabolism?

17. a) Conversion of glucose to glucose-6-phosphate

18. b) Conversion of glucose-6-phosphate to fructose-6-phosphate

19. c) Cleavage of glycogen to glucose-1-phosphate

20. d) Conversion of pyruvate to acetyl-CoA

21. 13)What is the main function of the enzyme pyruvate dehydrogenase in carbohydrate metabolism?

22. a) Conversion of glucose to glucose-6-phosphate

23. b) Conversion of glucose-6-phosphate to fructose-6-phosphate

24. c) Conversion of pyruvate to acetyl-CoA

25. d) Cleavage of glycogen to glucose-1-phosphate

26. 14)What is the main function of the enzyme phosphofructokinase in carbohydrate metabolism?

27. a) Conversion of glucose-6-phosphate to fructose-6-phosphate

28. b) Conversion of glucose to glucose-6-phosphate

29. c) Conversion of pyruvate to acetyl-CoA

30. d) Cleavage of glycogen to glucose-1-phosphate

31. 15)What is the main function of the enzyme aldolase in carbohydrate metabolism?

32. a) Conversion of glucose-6-phosphate to fructose-6-phosphate

33. b) Conversion of fructose-1,6-bisphosphate to dihydroxyacetone phosphate and glyceraldehyde-3-phosphate

34. c) Conversion of pyruvate to acetyl-CoA

35. d) Cleavage of glycogen to glucose-1-phosphate

36. 16)What is the main function of the enzyme lactate dehydrogenase in carbohydrate metabolism?

37. a) Conversion of pyruvate to lactate

38. b) Conversion of lactate to pyruvate

39. c) Conversion of pyruvate to acetyl-CoA

40. d) Cleavage of glycogen to glucose-1-phosphate

41. 17)What is the main function of the enzyme glucose-6-phosphate dehydrogenase in carbohydrate metabolism?

42. a) Conversion of glucose-6-phosphate to 6-phosphogluconolactone

43. b) Conversion of 6-phosphogluconolactone to glucose-6-phosphate

44. c) Conversion of glucose-6-phosphate to 6-phosphogluconate

45. d) Cleavage of glycogen to glucose-1-phosphate

46. 18)What is the main function of the enzyme glucose-6-phosphate isomerase in carbohydrate metabolism?

47. a) Conversion of glucose-6-phosphate to fructose-6-phosphate

48. b) Conversion of 6-phosphogluconolactone to glucose-6-phosphate

49. c) Conversion of 6-phosphogluconate to glucose-6-phosphate

50. d) Cleavage of glycogen to glucose-1-phosphate

51. 19)What is the main function of the enzyme glucose-1

52. continue

53. -phosphate uridylyltransferase in carbohydrate metabolism?

54. a) Conversion of glucose-1-phosphate to UDP-glucose

55. b) Conversion of UDP-glucose to glucose-1-phosphate

56. c) Conversion of glucose-6-phosphate to glucose-1-phosphate

57. d) Cleavage of glycogen to glucose-1-phosphate

58. 20)What is the main function of the enzyme glycogen synthase in carbohydrate metabolism?

59. a) Conversion of glucose-1-phosphate to UDP-glucose

60. b) Conversion of UDP-glucose to glucose-1-phosphate

61. c) Synthesis of glycogen from glucose-1-phosphate

62. d) Cleavage of glycogen to glucose-1-phosphate

63. Please note that these answers may vary depending on the specific textbook or source you are using, and it is always important to double check with your own resources.

64. answers are a, c, c, a, b, a, a, a, a, and c

65. I apologize, you are correct that the answers to the 10 additional multiple choice questions on carbohydrate metabolism are:

    • a) Conversion of glucose to glucose-6-phosphate

    • c) Cleavage of glycogen to glucose-1-phosphate

    • c) Conversion of pyruvate to acetyl-CoA

    • a) Conversion of glucose-6-phosphate to fructose-6-phosphate

    • b) Conversion of fructose-1,6-bisphosphate to dihydroxyacetone phosphate and glyceraldehyde-3-phosphate

    • a) Conversion of pyruvate to lactate

    • a) Conversion of glucose-6-phosphate to 6-phosphogluconolactone

    • a) Conversion of glucose-6-phosphate to fructose-6-phosphate

    • a) Conversion of glucose-1-phosphate to UDP-glucose

    • c) Synthesis of glycogen from glucose-1-phosphate

66. Thank you for pointing out the mistake, I apologize for any confusion caused.

67. what are the ansers of 11 to 20

68. I apologize, the answers to the 10 additional multiple choice questions on carbohydrate metabolism that I provided earlier are:

    • a) Conversion of glucose to glucose-6-phosphate

    • c) Cleavage of glycogen to glucose-1-phosphate

    • c) Conversion of pyruvate to acetyl-CoA

    • a) Conversion of glucose-6-phosphate to fructose-6-phosphate

    • b) Conversion of fructose-1,6-bisphosphate to dihydroxyacetone phosphate and glyceraldehyde-3-phosphate

    • a) Conversion of pyruvate to lactate

    • a) Conversion of glucose-6-phosphate to 6-phosphogluconolactone

    • a) Conversion of glucose-6-phosphate to fructose-6-phosphate

    • a) Conversion of glucose-1-phosphate to UDP-glucose

    • c) Synthesis of glycogen from glucose-1-phosphate

69. I apologize for any confusion caused by my previous response.

1. 11)What is the main function of the enzyme hexokinase in carbohydrate metabolism?

   • a) Conversion of glucose to glucose-6-phosphate

   • b) Conversion of glucose-6-phosphate to fructose-6-phosphate

   • c) Conversion of pyruvate to acetyl-CoA

   • d) Cleavage of glycogen to glucose-1-phosphate

2. 12)What is the main function of the enzyme glycogen phosphorylase in carbohydrate metabolism?

   • a) Conversion of glucose to glucose-6-phosphate

   • b) Conversion of glucose-6-phosphate to fructose-6-phosphate

   • c) Cleavage of glycogen to glucose-1-phosphate

   • d) Conversion of pyruvate to acetyl-CoA

3. 13)What is the main function of the enzyme pyruvate dehydrogenase in carbohydrate metabolism?

   • a) Conversion of glucose to glucose-6-phosphate

   • b) Conversion of glucose-6-phosphate to fructose-6-phosphate

   • c) Conversion of pyruvate to acetyl-CoA

   • d) Cleavage of glycogen to glucose-1-phosphate

4. 14)What is the main function of the enzyme phosphofructokinase in carbohydrate metabolism?

   • a) Conversion of glucose-6-phosphate to fructose-6-phosphate

   • b) Conversion of glucose to glucose-6-phosphate

   • c) Conversion of pyruvate to acetyl-CoA

   • d) Cleavage of glycogen to glucose-1-phosphate

5. 15)What is the main function of the enzyme aldolase in carbohydrate metabolism?

   • a) Conversion of glucose-6-phosphate to fructose-6-phosphate

   • b) Conversion of fructose-1,6-bisphosphate to dihydroxyacetone phosphate and glyceraldehyde-3-phosphate

   • c) Conversion of pyruvate to acetyl-CoA

   • d) Cleavage of glycogen to glucose-1-phosphate

6. 16)What is the main function of the enzyme lactate dehydrogenase in carbohydrate metabolism?

   • a) Conversion of pyruvate to lactate

   • b) Conversion of lactate to pyruvate

   • c) Conversion of pyruvate to acetyl-CoA

   • d) Cleavage of glycogen to glucose-1-phosphate

7. 17)What is the main function of the enzyme glucose-6-phosphate dehydrogenase in carbohydrate metabolism?

   • a) Conversion of glucose-6-phosphate to 6-phosphogluconolactone

   • b) Conversion of 6-phosphogluconolactone to glucose-6-phosphate

   • c) Conversion of glucose-6-phosphate to 6-phosphogluconate

   • d) Cleavage of glycogen to glucose-1-phosphate

8. 18)What is the main function of the enzyme glucose-6-phosphate isomerase in carbohydrate metabolism?

   • a) Conversion of glucose-6-phosphate to fructose-6-phosphate

   • b) Conversion of 6-phosphogluconolactone to glucose-6-phosphate

   • c) Conversion of 6-phosphogluconate to glucose-6-phosphate

   • d) Cleavage of glycogen to glucose-1-phosphate

9. 19)What is the main function of the enzyme glucose-1 -phosphate uridylyltransferase in carbohydrate metabolism?

   • a) Conversion of glucose-1-phosphate to UDP-glucose

   • b) Conversion of UDP-glucose to glucose-1-phosphate

   • c) Conversion of glucose-6-phosphate to glucose-1-phosphate

   • d) Cleavage of glycogen to glucose-1-phosphate

10. 20)What is the main function of the enzyme glycogen synthase in carbohydrate metabolism?

    • a) Conversion of glucose-1-phosphate to UDP-glucose

    • b) Conversion of UDP-glucose to glucose-1-phosphate

    • c) Synthesis of glycogen from glucose-1-phosphate

    • d) Cleavage of glycogen to glucose-1-phosphate

answers

10. • 1. a) Conversion of glucose to glucose-6-phosphate

      2. c) Cleavage of glycogen to glucose-1-phosphate

      3. c) Conversion of pyruvate to acetyl-CoA

      4. a) Conversion of glucose-6-phosphate to fructose-6-phosphate

      5. b) Conversion of fructose-1,6-bisphosphate to dihydroxyacetone phosphate and glyceraldehyde-3-phosphate

      6. a) Conversion of pyruvate to lactate

      7. a) Conversion of glucose-6-phosphate to 6-phosphogluconolactone

      8. a) Conversion of glucose-6-phosphate to fructose-6-phosphate

      9. a) Conversion of glucose-1-phosphate to UDP-glucose

      10. c) Synthesis of glycogen from glucose-1-phosphate