Cell Biology: Centrioles and Centrosomes
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Cell Biology: Centrioles and Centrosomes

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Questions and Answers

What is the typical arrangement of centrioles in a cell?

  • Randomly distributed throughout the cytoplasm
  • In a linear array near the nuclear membrane
  • In pairs, usually located at right angles to each other near the nuclear membrane (correct)
  • In a circular pattern surrounding the nucleus
  • What is the function of centrosomes in cells?

  • To synthesize proteins
  • To regulate cell growth
  • To store genetic material
  • To organize and reorganize microtubules (correct)
  • What is the composition of a centriole?

  • Nine triplets of microtubules (correct)
  • Nine single microtubules
  • Nine doublets of microtubules
  • A complex of proteins and lipids
  • What is a characteristic of centrosomes in plants and fungi?

    <p>They lack centrioles but still contain microtubule-organizing centres</p> Signup and view all the answers

    What is the region around the centrioles called?

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

    Study Notes

    Centrioles

    • Found in animal and most protist cells, occurring in pairs near the nuclear membrane
    • Each centriole consists of nine triplets of microtubules

    Centrosome

    • Region surrounding the centrioles
    • Acts as a microtubule-organizing center, nucleating microtubule assembly
    • Responsible for reorganizing microtubules during cell division
    • Found in plants and fungi, but lacking centrioles, still containing microtubule-organizing centers

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    Description

    Learn about centrioles, barrel-shaped organelles found in animal and protist cells, and their role in microtubule organization and cell division. Discover the structure and function of centrosomes and their importance in cellular processes.

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