The process of converting no 3 to n 2 is called a

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44. The process of converting NO 3 - to N 2 is called A) nitrogen fixation D) denitrification B) nitrogen reduction E) nitrate reduction C) nitrification 45. The breakdown product of leucine is acetyl-CoA. This amino acid would be classified as Scrambled version B Page 5
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46. Which of the following is an activator of carbamoyl phosphate synthetase? 47. Complete oxidation of _____ chain fatty acids utilizes enzymes of the TCA cycle. 48. Which of the ketone bodies can be decarboxylated non-enzymatically? A) cholesterol B) acetoacetate C) 3-hydroxybutyrate D) acetone 49. In fatty acid catabolism, chain shortening occurs at the _____ end of the fatty acyl chain. 50. Diabetes mellitus Type ____ is an autoimmune response that destroys pancreatic cells and Type ____ occurs due to insulin resistance. In Type II, the liver responds by synthesizing ____ glucose. 51. Which enzyme associated with nucleotide metabolism utilizes a cysteine free radical in its mechanism? Section III: 18 points, total (3 points each) 52. How many protons accumulate in the thylakoid lumen in the production of 1 O 2 and 2 NADPH? A) 4 B) 8 C) 10 D) 12 E) 14 53. Which of the following would most likely be involved in limiting the signaling effect of insulin? 54. How many ATP-equivalent molecules will be generated by β oxidation of a saturated fatty acid with 19 carbons? (1 QH 2 = 1.5 ATP; 1 NAD(P)H = 2.5 ATP) 55. Ribose phosphate pyrophosphokinase catalyzes the conversion of ribose-5-phosphate to PRPP. How do ADP and GDP regulate this enzyme? Scrambled version B Page 6
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56. Melvin Calvin and his colleagues noted that when 14 CO 2 was added to algal cells, a single compound was radiolabeled within 5 seconds of exposure. What is the compound? A) ribulose-5-phosphate D) 3-phosphoglycerate B) glyceraldehyde-3-phosphate E) 2-phosphoglycolate C) ribulose bisphosphate
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