Types of Retroposons Quiz
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Questions and Answers

Which family of retrotransposable elements is known for its high copy number in the human genome?

  • Copia
  • Alu family (correct)
  • L1 elements
  • Ty elements
  • What is the characteristic feature of microsatellite DNA?

  • Has highly variable array size and copy number (correct)
  • Consists of arrays of long repeat units
  • Found in heterochromatin
  • Does not exhibit tandem repeats
  • What is a characteristic feature of LINEs (Long Interspersed Nuclear Elements) in mammals?

  • They are autonomous elements
  • They are processed pseudogenes
  • They are transcribed by RNA polymerase II (correct)
  • They lack long terminal repeats
  • Which statement about transposable elements (TEs) is true?

    <p>TEs are highly mobile and can move repeatedly through the genome</p> Signup and view all the answers

    Which term is used to describe transposable elements that do not have the ability to transpose themselves?

    <p>Non-autonomous elements</p> Signup and view all the answers

    What type of repeats are typically found in microsatellite DNA?

    <p>Tandem repeats</p> Signup and view all the answers

    In maize, what term is used to describe controlling elements identified by Barbara McClintock?

    <p>Ac/Ds transposition</p> Signup and view all the answers

    Which genetic element is known for causing many mutations with major phenotypic effects?

    <p>Ac/Ds transposons</p> Signup and view all the answers

    What is the function of reverse transcriptase and/or integrase in retrotransposable elements?

    <p>Integration of the element into the genome</p> Signup and view all the answers

    What is the characteristic length of transposable elements (TEs)?

    <p>2.7 kb</p> Signup and view all the answers

    Which term describes short sequences distributed widely in the genome, such as LINEs and SINEs?

    <p>Interspersed repeats</p> Signup and view all the answers

    Where are microsatellite DNA sequences typically found in the genome?

    <p>Euchromatin</p> Signup and view all the answers

    What is the mechanism of non-replicative transposition?

    <p>Cut and paste</p> Signup and view all the answers

    How did Barbara McClintock contribute to the study of transposable genetic elements?

    <p>She identified transposons as responsible for mutational changes</p> Signup and view all the answers

    What can transposable elements cause in the genome rearrangement process?

    <p>Chromosomal breakages</p> Signup and view all the answers

    What did the discovery of Ds and Ac transposable elements suggest about their position on chromosomes?

    <p>They could physically shift positions within the same chromosome or between chromosomes</p> Signup and view all the answers

    What is the main difference between non-replicative and replicative transposition?

    <p>Non-replicative involves moving DNA without replicating, while replicative involves DNA replication</p> Signup and view all the answers

    What role do transposons play as a substrate for cellular recombination?

    <p>They provide sites for reciprocal recombination leading to genomic rearrangements</p> Signup and view all the answers

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