Midterm_2010_A_answer

Midterm_2010_A_answer - Chem/Biochem 114B Mid-Term 2010...

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Chem/Biochem 114B Mid-Term 2010 Last Name, First Name Student ID Section Number Page 1 Ch e m / Bio c h e m 114B Midt e rm Exam February 5, 2010 Exam Version ‘A’ — Mark in ‘Test Form’ on Scantron Writ e your nam e and s tud e nt ID on E V ERY pag e of th e e xam Fill in th e bubbl e s for your s tud e nt ID on th e s c antron . R e pla ce th e alphab e ti c al l e tt e r in your student ID with the number ‘1’ (e.g., A = 1, U = 1) 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 2010 Last Name, First Name Student ID Section Number Page 2 Qu e s tion s 1-25 (3 pt s . e a c h): Multipl e c hoi ce 1. (3pts.) Whether a reaction proceeds is determined by the free energy of the reaction ( Δ G). The hydrolysis of of ATP to generate ADP and phosphate (P i ) has a Δ G°’ = 30.5 kJ/mol. This means that: A) The hydrolysis of ATP to ADP and P i will be spontaneous under any condition. B) The hydrolysis of ATP to ADP and P will only be spontaneous if there is a phosphatase to catalyze it. C) The hydrolysis of ATP to ADP and P will only be spontaneous if there is a kinase to catalyze it. D) The hydrolysis of ATP to ADP and P will not be spontaneous under any condition. E) none of the above Answer: E 2. (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 Answer: E 3. (3 pts.) How many electrons does the marked carbon atom own? A) 0 B) 1 C) 2 D) 3 E) 4 Answer: C 4. (3pts.) Which of the carrier molecules does NOT carry electrons? A) NADH B) FADH 2 C) FMNH 2 D) biotin E) cytochrome c Answer: D 5. (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 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 2010 Last Name, First Name Student ID Section Number Page 3 Answer: B 6. (3pts.) How many ATPs are invested in the first stage of glycolysis? A) 0 B) 1 C) 2 D) 3 E) 4 Answer: C 7. (3pts.) Aldol cleavage occurs at the bond between: A) C1 and C2 B) C2 and C3 C) C3 and C4 D) C4 and C5 E) C5 and C6 Answer: C 8. (3 pts.) Galactose is converted to which metabolite to enter the glycolysis pathway?
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Midterm_2010_A_answer - Chem/Biochem 114B Mid-Term 2010...

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