Exam-1-complete-Key - -2 pts Algebraic mistake Right...

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MCB 450 Fall, 2008 Examination 1 – Answer Key 1. C 2. D 3. B 4. D 5. C 6. B 7. C 8. A 9. D 10. E 11. D 12. E 13. A 14. C 15. E 16. C 17. B 18. B 19. D 20. B Question 21 -1 pt Calculated inverse value of base/acid and did not finish problem -2 pt Wrong value entered in equation or incorrectly interpreted negative exponential -3 pts Calculated inverse value and wrote down as the ratio of acid/base -4 pts Other Error in Hendersen-Hasselbach Equation Setup Question 22 -2 pts Wrong acid/base labels -2 pts Mislabel pI -2 pts Wrong label for pKs/titration of groups -2 pts Wrong net charge labels on abscissa -1 pts Wrong structure drawn for titration groups -1 pt Right net charges except label missing or mispositioned -1 pt Amino groups not properly distinguished or wrong order Question 23 A) -1 for no units No partial credit if answer not correct since it was simple addition B) -4 pts wrong equation -3 pts Wrong setup of products, reactants, delta G
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Unformatted text preview: -2 pts Algebraic mistake, Right Setup -1 pt for no units Question 24 If these words were not mentioned or conveyed in some fashion on the short answer, then the associated points were deducted. A) -1 pt diffusion requiring carrier -1 pt shows saturation B) -1 pt Hydrogen bonding -1 pt Secondary structure/regular protein structure C) -1 pt galactose + glucose -1 pt β 1->4 or β glycosidic linkage D) -1 pt glycerol -1 pt phosphate + choline + FAs E) -1 pt cleaves dsDNA -1 pt for extra information that is completely incorrect on any ID. Question 25 +1 pt for listing some of the Amino Acids that a Protease cleaves +1.5 pt for listing All Amino Acids or only Amino Acid in sequence that Protease cleaves without identifying terminus +2 pts for listing Amino Acids that Protease cleaves and terminus it cleaves The above point totals are mutually exclusive....
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This note was uploaded on 09/14/2009 for the course MCB 450 taught by Professor Mintel during the Summer '07 term at University of Illinois at Urbana–Champaign.

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Exam-1-complete-Key - -2 pts Algebraic mistake Right...

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