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exam%204%20and%20final - Bio 2 02.02 Erster Exam 4 Final M...

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.... Bio 202.02 (Erster) Exam 4 & Final May 12,2010 Exam 4 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. epressor to block transcription of the trp operon, the trp trepressor must'_J--+::--- A) bin e inducer B) bind to RNA polymerase C) bind to the enhancer D) bind to the promoter E) bind to tryptophan. 2) ~gy has led to all of the following except.. .. \) 'J. ~roducts with higher nutritional value such as casein-enriched milk and vitamin A-enriched rice. ~crobes that can clean up the environment by recovering heavy metals from industrial wastes. C) the ability to determine the DNA sequence of extinct organisms such as Neanderthal man and woolly mammoth. D) reproductive cloning of primates E) crops that are resistant to insects, frost, salinity, and herbicides. rttPNA. '\l"- 3~bosomes can attach to prokaryotic messenger RNA . 1"- ...... A) only after the transcript has been capped and polyadenylated L7 B) only after the introns have been removed C) only after the transcript has been exported to the cytoplasm D) before transcription is complete. \\. 4) HiW4evels of gluc~se inhibit ~anscription of the lac operon by __ _ I~ reducing f!1e levels of intracellular cAMP. B) binding to the CAP protein .q activating adenylyl cyclase. D) strengthening the binding of lac repressor to the operator . . ch of the following is most likely to have a small protein called ubiquitin attached to it? ¥6tc/f'p,~! A) an mRNA produced by an egg cell that will be retained until after fettiliiation B) a cell surface protein that requires transport from the E,R C) a regulatory p-rotein.that requires sugar residues to be attached D) an mRNA that is leaving the nucleus to be translated E) a cyclin that acts in G2, now that the cell is in M Pagel
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V Bio 202.02 (Erster) Exam 4 &. Final May 12.2010 Exam 4 ]JJ:;:J-:: :3 t '. D6) HIV therapies: which of the following, if any, is correct? Lf'7- 1-2 - \ Y A) AZf interferes with the proteolytic cleavage of HIV proteins ;- A:: B) Integrase inhibitors block the interaction between HIV envelope glycoproteins and r ~ the CD4 receptor C) Fusion inhibitors block the insertion of the HIV -encoded glycoproteins into the host cell plasma membrane D) all of the above are correct E) none of the above are correct 7) Although the expression of most genes in prokaryotes is ~ regulated, some genes ~ . are e~pressed at roughly cons . . constitutively). Which of the following genes r ~d you predict to onstitutivel ex resse . , e functioning of enhancers is an example of .. transcriptional control of gene expression. ~ __ B) the stimulation of translation by initiation factors.
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