BIOL 251 EXAM 2 STUDY GUIDE QUESTIONS AND VERIFIED ANSWERS

Purines have this many rings


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two




corepressor of trp operon


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Tryptophan




Shine Dalgarno sequence is the same as

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ribosome binding site




When Trp-tRNA is abundant


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ribosome is not stalled and the leader peptide is fully translated




The 5' untranslated region is before the


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start codon




Gyrase


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introduces negative supercoils via ds breaks, acts in front of RNA
polymerase




Bacteria have several sigma factors because


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, they transcribe different genes under particular conditions




Translation actually starts at


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+1




RNA polymerase can bind because


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it recognizes -10 and -35




allosteric


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the protein has changed shape




Start codons


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, AUG, GUG, UUG




RNA polymerase is a


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multiple subunit enzyme




The Trp operon pathway begins with ______ and ends with ______


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Chorismate; L-tryptophan




Attenuation is only possible since


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transcription and translation are coupled




Cell Wall Synthesis Disruptors


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