CellBiology
  • Lysosome - Ultrasturucture and Polymorphism November 16, 2014

    Christian de Duve first observed these organelles in animal cells in 1949, by cell fractionation studies and Novikoff (1960) suggested that they are derived from pinocytic vesicles. These are single membrane bound small vesicular structures of 0.2 ...

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  • Vesicular transport processes or transcytosis November 16, 2014

    Many substances are transported across the cell membrane by endocytosis and exocytosis. ...

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  • Plasma Membrane March 28, 2012

    It is the outer limiting membrane of both prokaryotic and eukaryotic cells. It is an ultra thin, elastic, living membrane. Plasma membrane is a dynamic and selective transport barrier. Since the plasma membrane is ultra thin, it could ...

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  • Cytological Techniques March 23, 2012

    Cells are transparent and optically homogeneous organisations. They can be observed either directly or after preservation. For direct observation, the specimen needs sufficient contrast. Direct observation is possible by using vital stains. Vital stains :- ...

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  • Microscopy March 23, 2012

    The cells are very minute and complex organisations. The small dimensions and transparent nature of cell and its organelles pose problems to cell biologists trying to understand its organisation and functioning. Various ...

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