Investigation of Cell Structure 3.0 / 5 based on 1 rating ? BiologyCellular processes and structureASAQA Created by: Former MemberCreated on: 09-05-13 09:35 Magnification= Length of image / Length of Specimen 1 of 20 Smallest unit of measure Nanometre 2 of 20 Magnification is... how much bigger an image is than the specimen 3 of 20 Resolution how a microscope distinguishes between two points that are close together 4 of 20 Length of image Magnification * Length of Specimen 5 of 20 Homogenisation Breaking up the cells 6 of 20 Filteration Separating cell debris or tissue debris, like connective tissue, from the organelles. 7 of 20 Ultracentrifugation Separating Organelles 8 of 20 During Homogenization the solution is kept ice cold to reduce enzyme activity that break down organelles 9 of 20 During Homogenization the solution is kept isotonic to prevent the movement of water in and out of organelles by osmosis 10 of 20 Isotopic means same concentration of chemicals as the cells being broken down 11 of 20 During Homogenization a buffer is added to the solution to prevent changes in pH 12 of 20 Order of which organelles are separated during ultracentrifugation Nuclei, Mitohondria, Lysosome, ER, Ribosomes 13 of 20 1000µm 1mm 14 of 20 Which has the shortest wavelength? (Light or Electrons) Electrons 15 of 20 TEMs stands for Transmission electron microscope 16 of 20 SEMs stands for Scanning electron microscope 17 of 20 Advantage of SEMs Can be used on thick specimen. 18 of 20 Advantage of SEMs Can produce 3D images 19 of 20 Disadvantage of both SEMs and TEMs Can only be used on non-living things 20 of 20
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