BCECE Medical BCECE Medical Solved Papers-2010

  • question_answer
    Spindle fibre is made up of

    A)  tubulin

    B)  humulin

    C)  intermediate filament

    D)  flagellin

    Correct Answer: A

    Solution :

    Tubulin is a cytoskeletal globular protein that polymerises to form microtubules. It plays a motile and contractile role in cell structure and in cell division. During, cell division, the microtubules radiate from each end of the cell to form a basket like arrangement -(the spindle), which helps in the movement of chromosomes to poles. The principal protein of cilia and flagella is also tubulin. Microtubules play a key role in the movement of cilia and flagella. Intermediate filaments are tough, rope-like bundles of protein (keratin, desmin, peripherin, vimentin, etc). Intermediate filaments provide mechanical stability to cells. They interact with microfilaments (made of protein, actin) and microtubules to form cytoskeleton.


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