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DNA Repair Mechanisms Quiz
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DNA Repair Mechanisms Quiz

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Questions and Answers

What is the main focus of DNA repair mechanisms discussed in the text?

  • Reversal of DNA base alterations
  • Base excision repair
  • Repair of double-strand breaks (correct)
  • Correction of replication errors

    • Which repair mechanism can fix damaged bases or nucleotides specifically?

  • Mismatch repair
  • Double-strand break repair
  • Base excision repair (correct)
  • Homologous recombination

    • In DNA repair, what is the purpose of the SOS system?

  • Correcting mismatched bases
  • Reversing deaminated bases
  • Reversing alkylated bases
  • Error-prone repairs in case of extensive damage (correct)

    • Which mechanism can repair errors that occur during DNA replication?

    <p>Mismatch repair</p> Signup and view all the answers

    What distinguishes methyl-directed mismatch repair in DNA repair mechanisms?

    <p>It can discern parental from newly synthesized DNA strands</p> Signup and view all the answers

    Which system is involved in fixing breaks that occur in both strands of the DNA helix?

    <p>Microhomology-mediated end-joining (MMEJ)</p> Signup and view all the answers

    What is the outcome of nonhomologous end-joining mechanisms used to repair double-strand breaks?

    <p>Introducing deletions or insertions during repair</p> Signup and view all the answers

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