RNA and Gene Regulation
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Questions and Answers

Which RNA molecules possess catalytic activity?

  • Ribozymes (correct)
  • tRNAs
  • miRNAs
  • snRNPs

    • What is the primary role of MiRNAs in gene expression?

  • Controlling translation initiation
  • Initiating transcription
  • Regulating gene expression by base pairing (correct)
  • Encoding proteins from mRNA

    • Which amino acid has only a single codon that specifies it?

  • Cysteine
  • Methionine (correct)
  • Leucine
  • Tryptophan

    • What is the function of chaperones in protein folding?

    <p>Mediating correct protein folding to avoid incorrect patterns (B)</p> Signup and view all the answers

    What environmental factor contributes to a high rate of mutations?

    <p>Exposure to mutagenic agents (A)</p> Signup and view all the answers

    Which type of mutation results in the creation of a different protein?

    <p>Missense mutations (D)</p> Signup and view all the answers

    Which cells give rise to gametes in an organism?

    <p>Germ-line cells (D)</p> Signup and view all the answers

    'Polycistronic' mRNAs encode several proteins from the same mRNA in which type of cells?

    <p>(Prokaryotic cells) (D)</p> Signup and view all the answers

    'Transition' mutations involve changes between which types of nucleotides?

    <p>(Purines) with purines (B)</p> Signup and view all the answers

    What is the primary function of Antibiotic Chloramphenicol?

    <p>Blocks peptidyl transferase reaction on ribosomes (A)</p> Signup and view all the answers

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