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IB Biology HL - Magnification & Cells (adapted from Stephen Taylor: thanks, buddy.) Name:______________________________________________ Show all your working in these practice questions T4 Bacteriophage (25,000 x). What kind of image is this? What is the diameter of the head of this virus ? ( ) Why are viruses considered non-living? The scale bar on this engineered SEM image represents 1nm. What is the magnification of the image? What is the height of the model toilet? This image shows a leaf vein in cross section. Are plant cells prokaryotic or eukaryotic? What are three differences between plant and animal cells? What is the magnification of this image? What is the diameter of one of the xylem cells? Images from: http://www.zyvexlabs.com/EIPBNuG/2005MicroGraph.html ; http://www.mos.org/sln/SEM/leafvein.html ; http://www.biologie.uni-hamburg.de/bonline/library/webb/BOT201/BOT201/Algae/Bot201cyanobacteriacellTEM.gif ; http://www.microscopy.fsu.edu/micro/gallery/mitosis/earlyanaphase.jpg IB Biology HL - Magnification & Cells (adapted from Stephen Taylor: thanks, buddy.) Name:______________________________________________ TEM image shows a cell dividing. What is the magnification of this image? What is the maximum length across this dividing cell? Is this an image of a prokaryote or eukaryote cell? What clues in the image lead you to that conclusion? This is a light microscope image of an onion cell in mitosis. Which phase of mitosis does this show? This image has been magnified 1000x. What is the length of the cell? Which cell organelle is shown in this image? What is its function? How does it maximize its surface area: volume ratio? What is the magnification of the image? What is the width of the organelle? Images from: http://www.zyvexlabs.com/EIPBNuG/2005MicroGraph.html ; http://www.mos.org/sln/SEM/leafvein.html ; http://www.biologie.uni-hamburg.de/bonline/library/webb/BOT201/BOT201/Algae/Bot201cyanobacteriacellTEM.gif ; http://www.microscopy.fsu.edu/micro/gallery/mitosis/earlyanaphase.jpg
