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Molecular Biology: RNA Processing and Gene Regulation
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Molecular Biology: RNA Processing and Gene Regulation

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Questions and Answers

What is a key step in the post-transcriptional modification of messenger RNA in eukaryotes?

  • The addition of a 5' cap (correct)
  • Rho-dependent termination:
  • formation of many hairpin loops to form a clover leaf structure
  • Termination of the anticodon

    • Which of the following are typically not found in eukaryotes?

  • Spliceosomes
  • Promoters
  • Polycistronic mRNAs (correct)
  • Polyadenylation of the 3' end

    • When glucose is present at high levels, what happens to the rate of transcription of structural genes in the lac operon?

  • It decreases because glucose inhibits the production of cAMP (correct)
  • It increases because glucose binds to a repressor
  • It remains the same
  • It decreases because glucose unwinds the chromatin structure of DNA

    • What is a consequence of 'wobble' in the process of translation?

    <p>The codon of one protein can bind to more than one tRNA</p> Signup and view all the answers

    During the elongation phase of translation, transfer RNAs will move from which sites on the ribosome?

    <p>The A site to the P site to the E site</p> Signup and view all the answers

    When Molecule B is present, what happens to the transcription of Gene A?

    <p>It is turned on because Molecule B binds to an activator protein</p> Signup and view all the answers

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