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Gene Mutations and Their Effects
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Gene Mutations and Their Effects

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Questions and Answers

What is the role of tRNA anticodons in translation?

  • They unwind the DNA double helix.
  • They create hydrogen bonds between nucleotides.
  • They attach to mRNA codons to bring the corresponding amino acid. (correct)
  • They synthesize new DNA strands.
  • During translation, what is the main function of amino acids?

  • To act as enzymes for DNA replication.
  • To form hydrogen bonds with DNA strands.
  • To build proteins based on the mRNA sequence. (correct)
  • To determine the genetic code.
  • Which of the following is NOT a common cause of mutations?

  • Healthy lifestyle choices. (correct)
  • Exposure to mutagenic chemicals or radiation.
  • Environmental factors.
  • Errors during DNA replication.
  • What happens when a mutation alters the DNA sequence in a gene?

    <p>The gene may produce a non-functional protein or an abnormal protein.</p> Signup and view all the answers

    Which type of mutation results in the substitution of one nucleotide base for another?

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

    What is the main difference between a deletion mutation and an insertion mutation?

    <p>Deletion removes a nucleotide, while insertion adds an extra nucleotide.</p> Signup and view all the answers

    Which type of mutation occurs when one or more nucleotides are added to or removed from the DNA sequence?

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

    What is a missense mutation?

    <p>A mutation that causes a different amino acid to be incorporated into the protein.</p> Signup and view all the answers

    What is a silent mutation?

    <p>A mutation with no effect on the protein product.</p> Signup and view all the answers

    Which type of mutation can change multiple codons following the mutation point?

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

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