1.1 (1) Living organisms consist of cells 0.0 / 5 ? BiologyBiological molecules, organic chemistry and biochemistryBiological moleculesASOCR Created by: thatgirlcharlesCreated on: 27-01-15 10:28 Define magnification Magnification is the degree to which the size of an image is larger than the object itself. 1 of 8 Define resolution Resolution refers to the ability to see two distinct points separetley. 2 of 8 What is the magnification and resolution of a light microscope? magnification = x1500 Resolution = 200nm 3 of 8 Why is the resolution only 200nm? Because the particles have to be atleast half the wavelength of light apart to see them with a light microscope. 4 of 8 What are the two methods of preparation of specimens for a light microscope? Staining and sectioning 5 of 8 Explain staining. Coloured stains are chemicals the bind to chemicals on or in the specimen. Some stains bing to specific cell structures. 6 of 8 Give two examples of stains that bind to specific cell structures. Acetic orcien stains DNA dark red, gentian violet stains bacterial cell walls. 7 of 8 Explain sectioning. Specimens are embedded in wax, then thin sections are cut without distorting the shape of the specimen. 8 of 8
The Cell Cycle, cell division by mitosis, meiosis, DNA and chromosomes and Homologus chromosomes 0.0 / 5
The Cell Cycle, cell division by mitosis, meiosis, DNA and chromosomes and Homologus chromosomes 0.0 / 5
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