Biology PAPER 1 MARK SCHEME

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Why are microscopes useful in the study of cell biology? Describe how you would set up a light microscope to look, and measure different types of cells What is the difference between magnification ... and resolution? Magnification – the number of times an image is enlarged from the actual size. Resolution – the ability to distinguish between 2 separate points. ………To see cell parts that are too small to see with the naked eye and understand the function of these organelles ……………………………………………………………………………………………………………………………………………………………………… ……………………………………………………………………………………………………………………………………………………………… Pages in textbook: Pages in revision guide: Place the slide on the stage. Use the lowest magnification first to centre and focus the specimen in the field of view. Once centred, use the next highest magnification. To measure the object, use an eyepiece graticule to calculate the size of the object. 4 What is the equation used to calculate magnification? Magnification = Image size divided by actual size Justify why people may want to use an electron microscope To give a higher resolution and magnification when studying organelles Complete the labels on the diagram of an animal cell, and describe the functions of these parts of the cell [Show More]

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