BMS1031 Bacterial Genetics Example Q's

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1. Repressor proteins:

  • A and C
  • D. act positively on gene expression
  • B. bind to RNA polymerase
  • A. negatively regulate gene expression
  • C. can bind to more than one DNA sequence at the same time
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2. cDNA cloning:

  • requires the enzyme reverse transcriptase
  • requires genomic DNA
  • does not require thought
  • requires bacteriophages
  • does not require ligation

3. which codon serves as the start codon in mRNA for translation?

  • AUG
  • AGU
  • UGA
  • UGG

4. In the presence of L-arabinose and absence of glucose which transcription factors are bound to the upstream promoter region of E.coli araBAD operon?

  • CRP protein
  • Lacl repressor and AraC
  • CRP and AraC
  • AraC protein
  • lacl repressor

5. cis-acting operator DNA sequences generally display:

  • dyad symmetry
  • no symmetry
  • super symmetry
  • symmetry
  • none of the above


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