x1-fall07-key - MCB 450 Fall, 2007 Examination 1 Answer Key...

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MCB 450 Fall, 2007 Examination 1 – Answer Key 1. D 2. C 3. B 4. A 5. D 6. B 7. E 8. B 9. D 10. C 11. E 12. A 13. A 14. E 15. C 16. pH = pK + log(A-/HA) 8.4 = 9.6 + log(A-/HA) -1.28 = log(A-/HA) 10 1.2 = HA/A- = 15.8/1 =[-NH 3+ ]/[-NH 2 ] 17. Basic pH Acidic +1 0 -1 Charge -2 Order in which groups titrate (from acidic to basic): α -carboxyl, R- carboxyl, α -amino 18. (5) Δ G o = -43.4 –(-30.5) = -12.8 kJ/mol (2) Because there are twice as many resonance forms for the products as for the reactants. (Could also talk about charge, but that is not as good.)
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19. Δ G = Δ G o + RTln{([G6P][ADP])/([Glu][ATP])} = -16.7 + .008314 · 310 ln {([0.083][0.14])/[5.0][1.85]} = -39.9 kJ/mol 20. Give credit for any reasonable answer. a) Transport against a conc. gradient b) Major phospholipids of membranes. Glycerol backbone + 2 fatty acyl residues + phosphate + choline c) disaccharide consisting of glucose and fructose d) base + sugar (ribose or deoxyribose)
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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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x1-fall07-key - MCB 450 Fall, 2007 Examination 1 Answer Key...

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