BIS103_08Final Key_

BIS103_08Final Key_ - BIS103-002 (Spring 2008) Final Exam...

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BIS103-002 (Spring 2008) Final Exam (June 9) Name_____________________________________ 1 Instructor: Abel Student ID # ANSWER KEY Pls., check appropriate box below. This exam consists of 6 questions. A maximum of 100 points can be earned. Partial credit will be given. There are a total of 12 pages, including the cover page and one blank sheet at the end for notes. However, do not use the blank sheet for your final answers. If you need more space, use the back of pages 2-11. Write your name on top of each page! Petitions for re-grading will be considered only if you have used permanent ink , unless an addition error has occurred. *IT IS YOUR RESPONSIBILITY TO WRITE LEGIBLE! No extra effort will be made to decipher your handwriting. T = 25 o C (298 K) T = 37 o C (310 K) R = 8.315 J mol -1 K -1 F = 96.5 kJ mol -1 V -1 n = equivalents of electrons Z = charge of proton Δ G = Δ G o ’ + RTln[Prod.]/[React.] Δ G = Δ G o ’ + 2.303RT Δ pH + ZF ΔΨ Δ G o’ = – nF Δ E o’ Δ E o’ = E o’ Oxidant – E o’ Reductant I,_______________________________________, authorize the University to distribute publicly this graded exam (e.g., handed out in class or left in a bin for pick up). I am aware of the fact that violations of the Academic Code of Conduct 1 may be reported to UC Davis Student Judicial Affairs. 1 Examples of academic misconduct include: receiving or providing unauthorized assistance on examinations, using unauthorized materials during an examination, altering an exam and submitting it for re-grading, or using false excuses to obtain extensions of time ( http://sja.ucdavis.edu/cac.htm ). Signature________________________________________ Date____________________________ Undergraduate Student Completing Incomplete Open Enrollment Student Graduate Student Question Value Score 1 22 2 23 3 12 4 12 5 11 6 20 (+2) TOTAL 100 (+2)
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BIS103-002 (Spring 2008) Final Exam (June 9) Name_____________________________________ 2 1. (22 pts.) Questions on fatty acid metabolism. a) Calculate how many moles of ATP and NADPH are required for the synthesis of lauric acid (a 12:0 fatty acid) from acetyl-CoA. Consider that the acetyl-CoA building blocks need to be exported out of the mitochondria. You must show your work for full credit. (6 pts) 1. Transport of 6 acetyl-CoA from mitochondria to cytosol (citrate shuttle): 6 ATP 2. Conversion of 5 acetyl-CoA to 5 malonyl-CoA: 5 ATP 3. Five rounds of fatty acid biosynthesis (2 NADPH per round): 10 NADPH Moles of ATP: 11 Moles of NADPH: 10 Also correct: 11 ATP 4 NADPH b) Assume that the 12:0 fatty acid is further oxidized to the 12:0( Δ 6 ) desaturated fatty acid using molecular oxygen as the oxidant. Provide a balanced equation for this desaturation step by filling in the blanks. (3 pts) 12:0 + O 2 + NADPH Î 12:0( Δ 6 ) + 2H 2 O + NADP + (+H + ) c) Which major pathway discussed in class provides most of the NADPH needed for fatty acid biosynthesis? (1 pt) Pathway: Pentose Phosphate Pathway (PPP) d) A minor process of NADPH formation takes place in the cytosol and may convert the NADH from
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BIS103_08Final Key_ - BIS103-002 (Spring 2008) Final Exam...

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