MCB450SU10_ExamIIIKEY

MCB450SU10_ExamIIIKEY - MCB 450 Summer 2010 Examination...

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MCB 450 Summer 2010 Examination Three – Answer Key 1. E 2. B 3. C 4. C 5. D 6. A 7. E 8. D 9. E 10. E 11. E 12. B 13. B 14. E 15. E 16. a. Vitamin with many derivatives, each transferring a single carbon atom at different oxidation levels. Involved in purine nucleotide biosynthesis and methionine cycle. b. An amino acid producing a ketone body (acetoacetate, β -hydroxybutyrate) as a final breakdown product which is then excreted. c. Framed by Crick to explain how only ~40 tRNAs can pair with 61 codons. A given tRNA can recognize more than one codon because there is more than one pairing possibility between the 5 end of the anticodon and the 3 end of the codon. d. Cleaves the serine residues from phosphorylase, making the enzyme less active. e. Region of DNA to which RNA polymerase binds. In E. coli , there are concensus sequences 10 and 35 nucleotideotide residues before the start of transcription that are important in RNA polymerase binding. 17.
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MCB450SU10_ExamIIIKEY - MCB 450 Summer 2010 Examination...

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