DNA Content and Nucleus Components Quiz
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Questions and Answers

What is the role of the nucleus in a cell?

  • Generating energy
  • Storing genetic information (correct)
  • Synthesizing proteins
  • Facilitating cell movement
  • Which term describes the complex consisting of DNA and proteins in the nucleus?

  • Chromatin fibers (correct)
  • Nucleosomes
  • Chromosomes
  • Centromeres
  • What is the purpose of nucleosomes in DNA organization?

  • To synthesize RNA molecules
  • To store excess nucleotides
  • To facilitate cell division
  • To provide structural support to DNA (correct)
  • What term refers to the condition where chromatin is tightly packed and transcriptionally inactive?

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

    Which part of the nucleus contains support filaments and plays a role in the organization of DNA?

    <p>Nuclear matrix</p> Signup and view all the answers

    How many pairs of chromosomes are present in a human karyotype?

    <p>23 pairs</p> Signup and view all the answers

    Where are the most transcribed genes usually located in the nucleus?

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

    Which type of chromatin is highly condensed and metabolically inactive?

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

    What is the purpose of the nuclear lamina?

    <p>Cell cycle regulation</p> Signup and view all the answers

    During which phase of the cell cycle does DNA replication occur?

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

    Which part of the nucleus is responsible for rRNA synthesis and initial ribosomal assembly?

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

    What is the function of euchromatin in the nucleus?

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

    During which stage of meiosis does chromosome number get reduced by half?

    <p>Anaphase I</p> Signup and view all the answers

    Which term refers to the level of mitotic activity in a population of similar cells that divide episodically to maintain normal tissue structure?

    <p>Stable cell population</p> Signup and view all the answers

    Which term describes the condition where an individual has an extra copy of a chromosome, known as trisomy?

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

    What is the term for a chromosomal abnormality involving the absence of a portion of a chromosome?

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

    Which type of cell population includes cells like neurons and mature skeletal muscle cells that do not divide after reaching maturity?

    <p>Renewing cell population</p> Signup and view all the answers

    What process involves two sets of division, with the first reducing the chromosome number by half?

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

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