21 - http/www4.ncsu.edu/~knopp/BCH451/e07a3.htm BCH 451...

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BCH 451 Spring 2007 Exam #3 NAME Circle your problem session time: W 1:30 - 3:20 W 3:40 - 5:30 H 1:30 - 3:20 Raw Score 1. Draw the predominate structures of the following molecules at the pH indicated. Be sure to include all carbon and hydrogen atoms! a. (1.5) A = cAMP; B = IP 3 [pH = 7] b. (4) D = pdUppAp; E = pTpdGpp [draw purines in anti and pyrimidines in syn ] c. (4 ) H = α-D-ribulofuranosyl (2 → 3)-β-D-mannopyranose; G = α-D-fructofuranosyl (2 → 3)-β-D- galactopyranose d. (4) L = 1-stearoyl-2-oleoyl-phosphatidylserine; M = 1-arachidoyl-2-linoleoyl-phosphatidylserine 2. Circle the RNA type which is specified on the first page: M R SN T a. (0.3) give the full and complete name: b. (0.7) give the size(s) or size range of this type in units of bases: c. (2) give the full description of the function of this type within the cell: 3. (3) Describe the central dogma concisely using the various RNA species: 4. ATP: a. (0.4) What is the free energy of hydrolysis of ATP? b. (0.3) What is the bond or linkage which is being broken during hydrolysis?
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