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OCR A-Level Biology - Modules 1-4
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why do specimens need to be thin when observing them under a light microscope? - to allow light to pass through Identify and explain the starch test - add iodine dissolved in potassium iodide solution to the sample - positive test = blue-black - negative test = orange-brown Why is the structure of the plasma membrane often referred to as the fluid mosaic model? - - the continuous bilayer is 'fluid' as the phospholipid molecules are constantly moving - protein molecules are scattered through the bilayer like a mosaic
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