Final exam key - CHEM 114B Final 2012 Last Name, First Name...

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CHEM 114B Final 2012 Last Name, First Name Student ID Section Number Page 1 CHEM 114B Final Exam 3:00pm- 5:59pm March 23, 2012 Write your name and student ID on EVERY page of the exam Fill in the bubbles for your student ID on the scantron. Use the number ‘1’ in place of ‘A’ or ‘U’ in your student ID (e.g. if your ID is A1234567, fill in 11234567) By signing below, I authorize Dr. Wang to leave my exam out for pick-up outside of Urey Hall 4254. I understand that my exam will be available for public scrutiny, and may be stolen. _______________________________________ Questions 1-40 Multiple Choice _________ out of 120 points Questions 41-50 Short Answer _________ out of 60 points Total _________ out of 180 points
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CHEM 114B Final 2012 Last Name, First Name Student ID Section Number Page 2 Questions 1-50 (3 pts. each): Multiple choices 1. (3 pts.) Which sugar(s) is (are) converted into ribulose 5-phosphate by a single enzymatic step? A) Xylulose 5-phosphate. B) Sedoheptulose 7-phosphate. C) erythrose 4-phosphate. D) 3-phosphoglycerate. E) None of above. Answer: A 2. (3pts.) Which of the following reactions is part of both the Calvin cycle and pentose phosphate pathway? Do NOT consider direction of the reaction. A) * 3 3 6 C C C B) 3 6 4 5 C C C C  C) 3 5 4 4 C C C C D) 4 3 7 C C C E) 3 7 6 4 C C C C Answer: B 3. (3pts.) Which of the statement about Calvin cycle or pentose phosphate pathway is correct? A) Calvin cycle contains three steps catalyzed by transketolase, aldolase and transketolase. B) Calvin cycle contains three steps catalyzed by transketolase, transaldolase and transketolase. C) Pentose phosphate pathway contains three steps catalyzed by transketolase, aldolase and transketolase. D) Pentose phosphate pathway contains three steps catalyzed by transaldolase, transketolase and transaldolase. E) None of the above. Answer: A 4. (3pts.) What is (are) the common reactant(s) in synthesis of sucrose and conversion of galactose 1-phosphate to glucose 1-phosphate? 1) Galactose 1-phosphate 2) Fructose 6-phosphate 3) UDP-glucose 4) glucose 1-phosphate 5) sucrose 6-phosphate A) 1
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CHEM 114B Final 2012 Last Name, First Name Student ID Section Number Page 3 B) 2 C) 3 D) 1 and 4 E) 3 and 5 Answer: C 5. (3pts.) Decarboxylation occurs in which of the following reactions: 1) glucose 6-phosphate -> ribulose 5-phosphate 2) ribulose 5-phosphate -> ribose 5-phosphate 3) -ketogluturate->succinyl-CoA 4) isocitrate -> -ketogluturate 5) ribulose 5 phosphate -> ribulose 1,5-bisphosphate A) 1 and 2 B) 2 and 3 C) 3, 4 and 5 D) 1, 3 and 4 E) 1, 4 and 5 Answer: D 6. (3pts.) In plants, CO 2 are fixed to synthesize sugars by Calvin cycle. How many CO 2 are fixed to synthesize one fructose 6-phosphate? A) 1 B) 2 C) 3 D) 4 E) 6 Answer: E 7. (3pts.) When the cells needs more ribose 5-phosphate to synthesize ribonucleotides, fructose 6-phosphate and glyceraldehyde 3-phosphate are consumed to synthesize ribose 5-phosphate. Which of the reactions is NOT included to generate ribose 5-phosphate from fructose 6-phosphate and glyceraldehyde 3-phosphate?
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This note was uploaded on 04/05/2012 for the course CHEM 114B chem 114B taught by Professor Weng during the Winter '11 term at UCSD.

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Final exam key - CHEM 114B Final 2012 Last Name, First Name...

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