19 - h Reaction catalyzed by protein kinase i Reducing end...

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BCH 451 Spring 2006 Exam #3 NAME 1. (1) definition: S = second messenger; T = transducer; E = effector enzyme 2. Draw the predominate structures of the following molecules at the pH indicated. Be sure to include all carbon and hydrogen atoms! a. (3) A = α-D-galactopyranosyl (1->3)β-D-ribulofuranose; B = α-D-glucopyranosyl (1->3)β- D-xylulofuranose both @ pH = 8.5 b. (3) C = 2-palmitoleoyl-phosphatidyl-inositol-6-phosphate; D = 2-oleoyl-phosphatidyl-inositol-6-phosphate both @ pH = 8.5 c. (4) E = pTpddAp; G = pdUppG both @ pH = 7 3. (2) Why would a DNA double helix be more stable in the presence of low concentrations of Mg ++ ? 4. Short answers (1 each) a. Full name of cAMP: b. Full name of IP 3 : c. Full name of lactose: d. Substrate for phospholipase C in signal transduction: e. Full name of MAP: f. Synonym for MAP: g. Cellular effects of signal transduction:
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Unformatted text preview: h. Reaction catalyzed by protein kinase: i. Reducing end of a homoglycan: 5. (1 each) What are the three modifications which are made to mRNA in eukaryote cells? 6. (2) Why would the cell expend all of the energy which would be necessary to make these modifications indicated in the previous question? 7. 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 bases: c. (2) give the full description of the function of this type within the cell: 8. (3) Describe the concept of a cascade using the RTK pathway: 9. (2) Draw the “O” linkage between β-D-mannopyranose and a protein: 1 of 1 4/27/2010 4:14 PM...
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