Mutation

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Questions and Answers

What is the simplest type of mutation?

  • Spontaneous mutations
  • Frameshift mutations
  • Point mutations (correct)
  • Nonsense mutations

Which of the following is a type of mutation?

  • Frameshift (correct)
  • Nonsense
  • Silent
  • Run-on

What is a mutation?

  • A random change in genetic information (correct)
  • A heritable change in the genetic material
  • An agent that causes mutations
  • A triplet stop codon

What type of mutation can lead to loss of function?

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

What is the consequence of a frameshift mutation?

<p>Loss of function (A)</p> Signup and view all the answers

What is a mutagen?

<p>An agent that causes mutations (A)</p> Signup and view all the answers

What type of mutation results in a new codon that codes for the same amino acid as the wild type codon in that position?

<p>Silent mutation (D)</p> Signup and view all the answers

What type of mutation results in a new codon that codes for the same amino acid as the wild type codon in that position?

<p>Silent mutation (C)</p> Signup and view all the answers

What is a consequence of a mutation?

<p>The death of a cell (B)</p> Signup and view all the answers

What is a mutagen?

<p>Agent that causes mutations (A)</p> Signup and view all the answers

What type of mutation involves substitutions that result in functionally different amino acids?

<p>Nonsense (A)</p> Signup and view all the answers

What type of mutation involves substitutions of one nucleotide?

<p>Point mutation (A)</p> Signup and view all the answers

What can increase the rate of mutation?

<p>High-energy radiation (B)</p> Signup and view all the answers

What is the rate of mutation increased by?

<p>Carcinogenic chemicals (B)</p> Signup and view all the answers

What type of mutation is the simplest type of mutation?

<p>Point (A)</p> Signup and view all the answers

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Study Notes

  • A mutation is a random change in genetic information.
  • A heritable change in the genetic material may be neutral, beneficial, or harmful.
  • Mutagen: Agent that causes mutations.
  • Spontaneous mutations: Occur in the absence of a mutagen.
  • Point mutations are the simplest type of mutation, involving substitutions of one nucleotide.
  • Frameshift mutations involve a shift in the reading frame of a gene, and can lead to loss of function.
  • Nonsense mutations involve substitutions that result in functionally different amino acids, and can lead to alteration or loss of protein function.
  • Silent mutations result in a new codon that code for the same amino acid as the wild type codon in that position.
  • Run-on mutations change the triplet stop codon to sense codon.
  • Insertions and deletions are more significant mutations than substitutions.
  • Mutations are rare events that can occur when DNA is replicating.
  • Mutations can have a number of consequences, including the death of a cell.
  • The rate of mutation can be increased by a number of factors, including carcinogenic chemicals and high-energy radiation.

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