CHEM114B_Midterm_Key

CHEM114B_Midterm_Key - Chem/Biochem 114B Mid-Term 2010 Last...

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Chem/Biochem 114B Mid-Term 2010 Last Name, First Name Student ID Section Number Page 1 Chem/Biochem 114B Midterm Exam February 5, 2010 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. Replace the alphabetical letter 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 Questions 1-25 (3 pts. each): Multiple choice 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 i will only be spontaneous if there is a phosphatase to catalyze it. C) The hydrolysis of ATP to ADP and P i will only be spontaneous if there is a kinase to catalyze it. D) The hydrolysis of ATP to ADP and P i 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? A)
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This note was uploaded on 05/26/2010 for the course CHEM CHEM 114B taught by Professor Wang during the Winter '10 term at UCSD.

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CHEM114B_Midterm_Key - Chem/Biochem 114B Mid-Term 2010 Last...

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