x3-spr09-key

x3-spr09-key - MCB 450 Spring 2009 Examination 3 Answer Key...

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MCB 450 Spring 2009 Examination 3 – Answer Key Please double-check answers before grading papers! 1. E 2. C 3. C 4. C 5. D 6. D 7. E 8. D 9. E 10. E 11. E 12. B 13. B 14. E 15. E 16. a) Biotin – required in carboxylation rxns in animal cells b) thiamine pyrophosphate – required in decarboxylation of α -ketoacids and transketolase reactions c) pyridoxal phosphate – cofactor involved in aminotransferase (transaminase) reactions d) phosphorylase phosphatase - converts active phosphorylase to a less active form, thus slowing glycogen degradation e) cap sequence – a sequence at the 5 end of eukaryotic mRNA with a methyl guanine linked to a neighboring G by a 5 ppp 5 link. Improves translational efficiency 17. a) (2) Fatty acids are more rediuced than carbohydrates. Fatty acids do not hydrogen-bond to water significantly. Therefore they are a much better energy storage form on a weight basis. b)
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x3-spr09-key - MCB 450 Spring 2009 Examination 3 Answer Key...

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