Cell Biology: The Nucleus
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Questions and Answers

What is the primary function of the nucleus?

  • To store genetic information and regulate gene expression (correct)
  • To maintain cellular structure and shape
  • To generate energy for the cell
  • To synthesize proteins
  • What is the typical percentage of cell volume occupied by the nucleus?

  • 20%
  • 30%
  • 10% (correct)
  • 5%
  • What is the term for the ratio of the size of the nucleus to the size of the cytoplasm?

  • Cytoplasmic index
  • Nuclear-to-cytoplasmic ratio (correct)
  • Cellular density
  • Nuclear volume fraction
  • What type of chromatin is more condensed and less accessible to gene expression machinery?

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

    In which type of cells is the nucleus often found in a peripheral position?

    <p>Adipocytes and skeletal muscle cells</p> Signup and view all the answers

    What is the approximate diameter of the nucleus in human cells?

    <p>6 µm</p> Signup and view all the answers

    What is the purpose of the nuclear envelope?

    <p>To distinguish the cytoplasm from the nucleus</p> Signup and view all the answers

    Which of the following is a characteristic of the nucleus in animal cells?

    <p>It is the largest organelle in the cell</p> Signup and view all the answers

    What is the significance of the nuclear-cytoplasmic ratio?

    <p>It is an indicator of cell malignancy</p> Signup and view all the answers

    What is the function of euchromatin regions?

    <p>To regulate gene expression</p> Signup and view all the answers

    Which of the following is a characteristic of the nucleus in some epithelial cells?

    <p>It is basally located in the cell</p> Signup and view all the answers

    What is the shape of the nucleus in some cells?

    <p>Multilobed or flattened</p> Signup and view all the answers

    Which of the following cells can have multiple nuclei?

    <p>Some eukaryotic cells</p> Signup and view all the answers

    What is the location of the nucleus in adipocytes?

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

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