Genetic Variation & DNA Repair Mechanism Quiz
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Questions and Answers

What is a mutation?

  • A change in the nucleotide sequence of a DNA molecule (correct)
  • A change in the nitrogenous bases of RNA
  • A change in the structure of a protein molecule
  • A change in the structure of a lipid molecule
  • Which type of mutations can be inherited by offspring?

  • Germline mutations (correct)
  • Mutations caused by physical mutagens
  • Mutations caused by chemical mutagens
  • Somatic mutations
  • What are the principal causes of many diseases like cancer?

  • Germline mutations
  • Physical mutagens
  • Mutations during DNA replication
  • Somatic mutations (correct)
  • In what way can mutations arise from the action of mutagens?

    <p>By breaking polynucleotide strands</p> Signup and view all the answers

    What is the most frequent spontaneous mutation?

    <p>Depurination of guanine</p> Signup and view all the answers

    How can chemical mutagens contribute to mutation?

    <p>By incorporating mismatched bases during replication</p> Signup and view all the answers

    Which type of mutation causes the substitution of an incorrect amino acid?

    <p>Nonsense mutation</p> Signup and view all the answers

    What is the effect of a nonsense mutation?

    <p>The codon becomes a termination codon</p> Signup and view all the answers

    Which source is categorized as an endogenous source (Internal) of induced mutations?

    <p>Reactive oxygen species</p> Signup and view all the answers

    What is the result of deamination during a spontaneous mutation?

    <p>Conversion of cytosine to uracil</p> Signup and view all the answers

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