Cell Nucleus: Structure and Function
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Questions and Answers

What is the main function of the cell nucleus?

  • Control of gene expression and mediation of DNA replication (correct)
  • Synthesis of proteins and lipids
  • Cellular respiration
  • Energy production and storage
  • Which type of cells usually lack a cell nucleus?

  • Muscle cells
  • Neurons
  • Mature mammalian red blood cells (correct)
  • Liver cells
  • What is the main constituent of chromatin?

  • Enzymes and ribosomes
  • Lipids and carbohydrates
  • Genetic material (DNA) and proteins (correct)
  • RNA and ATP
  • Where does rRNA synthesis primarily occur within the nucleus?

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

    What surrounds the nucleus, consisting of inner and outer nuclear membranes?

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

    Which chromosomal regions are involved in the formation of the nucleolus?

    <p>Short arms of chromosomes 13, 14, 15, 21 and 22</p> Signup and view all the answers

    What is the main function of the nucleolus?

    <p>Transcribing ribosomal RNA and combining it with proteins to form incomplete ribosomes</p> Signup and view all the answers

    Which part of the nucleolus contains inactive DNA?

    <p>Pale staining fibrillar center</p> Signup and view all the answers

    Where do maturing ribosomal subunits get assembled in the nucleolus?

    <p>Pars granulosa</p> Signup and view all the answers

    What migrates into the cytoplasm to participate in protein synthesis?

    <p>Small and large ribosomal subunits</p> Signup and view all the answers

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