midterm 2011 - Chem/Biochem 114B Mid-Term 2011 Last Name,...

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Chem/Biochem 114B Mid-Term 2011 Last Name, First Name Student ID Section Number Page 1 Chem/Biochem 114B Midterm Exam February 4, 2011 Exam Version ‘A’ — Mark in ‘Test Form’ on Scantron 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) Questions 1-25 Multiple Choice 75 points Questions 26-31 Short Answer 36 points 111 points
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Chem/Biochem 114B Mid-Term 2011 Last Name, First Name Student ID Section Number Page 2 Questions 1-25 (3 pts. each): Multiple choice 1. (3 pts.) Which of the following is at a higher level of oxidation than CH 3 CHO? A) CH 3 CH 2 OH B) CH 3 CO 2 H C) CH 3 CH 3 D) CH 2 =CH 2 E) none of the above Answer: B 2. (3 pts.) Consider the following metabolic reaction: Succinyl-CoA + Acetoacetate Acetoacetyl-CoA + Succinate G ° ' = –1.25 kJ/mol This reaction is: A) favorable under standard conditions. B) not favorable under standard conditions. C) always exergonic and can never proceed in the opposite direction. D) spontaneous as written when [succinate] and [acetoacetyl-CoA] are high. E) None of the above Answer: A 3. (3pts) FADH 2 is a carrier of A) electron. B) CO 2 . C) proton. D) CoA. E) None of the above Answer: A 4. (3 pts.) Consider the following metabolic reaction: Succinyl-CoA + Acetoacetate Acetoacetyl-CoA + Succinate G ° ' = –1.25 kJ/mol The G ° ' for the hydrolysis of Succinyl-CoA is –33.9 kJ/mol. What is the G ° ' for the hydrolysis of Acetoacetyl-CoA: Acetoacetyl-CoA Acetoacetate + CoA A) –35.2 kJ/mol B) –32.7 kJ/mol C) +32.7 kJ/mol D) +35.2 kJ/mole E) none of the above Answer: B 5. (3pts.) Which of the numbered arrows in the figure to the right points toward a “high-energy” phosphoanhydride bond? A) 1 B) 2 C) 3 D) 4 E) 5 N N N N NH 2 CH 2 O OH HO O P O O P O P - O O O O - O - O - 1 2 3 4 5
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Chem/Biochem 114B Mid-Term 2011 Last Name, First Name Student ID Section Number Page 3 Answer: E 6. (3pts.) In which of the following metabolic conversions is ATP “consumed” during glycolysis? A) 1,3-Bisphosphoglycerate 3-phosphoglycerate B) Glucose glucose-6-phosphate C) 2-Phosphoglycerate 3-phosphoglycerate D) Fructose-1,6-bisphosphate dihydroxyacetone phosphate + glyceraldehyde-3-phosphate E) Glucose-6-phosphate fructose-6-phosphate Answer: B 7. (3pts.) Arsenate ion (AsO 4 -3 ) can substitute for phosphate in the reaction catalyzed by glyceraldehyde-3-
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This note was uploaded on 05/05/2011 for the course CHEM 114B chem 114B taught by Professor Weng during the Spring '11 term at UCSD.

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midterm 2011 - Chem/Biochem 114B Mid-Term 2011 Last Name,...

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