Eukaryotic Chromatin Compaction Quiz
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Questions and Answers

What type of chromatin is generally associated with activation of transcription?

  • Telochromatin
  • Heterochromatin
  • Euchromatin (correct)
  • Mesochromatin
  • Which type of chromatin is generally associated with repression of transcription?

  • Parachromatin
  • Heterochromatin (correct)
  • Metachromatin
  • Euchromatin
  • What type of chromatin has a more open structure and less compaction level?

  • Heterochromatin
  • Euchromatin (correct)
  • Epichromatin
  • Cryptochrome
  • Which type of chromatin has a more condensed structure and higher compaction level?

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

    What type of modifications on histone proteins are generally associated with activation of transcription?

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

    Which type of modifications on histone proteins are generally associated with repression of transcription?

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

    Which type of chromatin is transcriptionally inactive in general?

    <p>Constitutive heterochromatin</p> Signup and view all the answers

    What is a characteristic of euchromatin?

    <p>Transcriptionally active</p> Signup and view all the answers

    Which region can interconvert between euchromatin and heterochromatin?

    <p>Facultative heterochromatin</p> Signup and view all the answers

    During interphase, in which type of chromatin are most chromosomal regions euchromatic?

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

    Which type of chromatin undergoes little gene transcription in metaphase chromosomes?

    <p>Metaphase chromatin</p> Signup and view all the answers

    What happens to the compaction level of sister chromatids by the end of prophase?

    <p>They are entirely heterochromatic</p> Signup and view all the answers

    What type of chromatin is typically less condensed, more accessible for gene expression, and actively transcribed?

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

    Which proteins are involved in compaction of eukaryotic chromatin by binding to the DNA backbone?

    <p>Histone proteins</p> Signup and view all the answers

    What is the role of nucleoid-associated proteins (NAPs) in prokaryotic DNA compaction?

    <p>Introduce bends and folds in DNA</p> Signup and view all the answers

    Which type of chromatin is typically highly condensed, transcriptionally inactive, and involved in structural functions like centromeres?

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

    In eukaryotic chromosomes, which histone protein acts as the linker histone between nucleosomes?

    <p>H1</p> Signup and view all the answers

    What is the approximate length of a single set of human chromosomes when stretched end to end?

    <p>~3 meters</p> Signup and view all the answers

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