BIS103_05MT2 Key_

BIS103_05MT2 Key_ - BIS103-001(Spring 2005 Midterm#2(May 19...

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BIS103-001 (Spring 2005) Midterm #2 (May 19) Name__________ ANSWER KEY 1 Instructor: Abel Student ID #_______________________________ 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 2-8. Write your name on top of each page! Petitions for regarding 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 = moles of electrons Z = charge of proton G = G o ’ + RTln[Prod.]/[React.] G = G o ’ + 2.303RT pH + ZF ∆Ψ G o’ = – nF E o’ 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 11 2 17 (+2) 3 14 4 24 5 12 6 22 TOTAL 100 (+2)
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BIS103-001 (Spring 2005) Midterm #2 (May 19) Name__________ ANSWER KEY 2 1. (11 pts) The concentration of lactate in the blood of a resting adult is typically between 1-3 mM, whereas blood lactate concentrations of 10-20 mM are measured after intense physical work or athletic activity. Answer the following questions: a) Draw the structure of lactate into the provided box. (3 pts) See booklet for structure b) Why is it not necessary to phosphorylate lactate in the cell? (2 pts) Be short! Lactate is a carboxylic acid. At physiological pH, lactate is dissociated (a carboxylate anion), which prevents its diffusion across the plasma membrane. c) What cell type, tissue or organ is the major source of lactate in the blood of a resting adult? (2 pts) Encircle only one! Heart Muscle Skeletal Muscle Brain Liver Erythrocytes Macrophages d) What cell type, tissue or organ is the major source of the additional lactate in the blood after heavy exercise ? (2 pts) Encircle only one! Heart Muscle
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BIS103_05MT2 Key_ - BIS103-001(Spring 2005 Midterm#2(May 19...

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