Centrosome and Centrioles


 
 
Concept Explanation
 

Centrosome and Centrioles

Centrosomes: This structure is present only in animal cells. The main function of centrosomes is to initiate and regulate cell division. The centrosome is a distinct region of the cytoplasm close to the nucleus of animal cells. It usually has two central granules called Centrioles.

Centrioles: The Centrioles are hollow, cylindrical structures made of microtubules arranged in a specific manner. They are arranged at right angles to each other.

Function of Centrioles:

  • At the time of cell division, Centrioles move to the poles and form spindle fibres which help in the movement of chromatids (daughter chromosomes) in the daughter cells.
  • They help in the formation of cilia and flagella. Cilia are short, hair like projections that occur in large numbers outside the surface of certain animal cells. They cover the entire surface of the cell. For example paramecium. Cilia are organs of locomotion. Flagella are long, thread like structure at one end of the cell. There are generally few flagella on a cell. For example, euglena.
  • Sample Questions
    (More Questions for each concept available in Login)
    Question : 1

    Which of the following is the function of centriole ?

    Right Option : A
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    Explanation
    Question : 2

    Structure found only in animal cells and which regulates cell division is _________________

    Right Option : C
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    Explanation
    Question : 3

    The centriole in animal cell is mostly like _______________

    Right Option : B
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    Explanation
     
     
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