Question
Shadow casting
Answer :
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Shadow casting in cell and molecular biology refers to a technique used primarily in electron microscopy to study the surface morphology and topography of biological specimens at high resolution. It involves depositing a thin layer of heavy metal, such as platinum or gold, onto the specimen at an oblique angle. The metal coats the exposed surfaces, creating a contrast between the illuminated areas and the shadowed regions, which enhances the three-dimensional appearance of the sample when viewed under an electron microscope. This method is particularly useful for observing fine structural details of membranes, filaments, viruses, and macromolecular complexes that are difficult to
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