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Summary CIE A level Biology unit 01 - cell structure

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Everything you need to know about unit 01 of the CIE A level biology course!

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1.1 - The microscope in cell studies:

Units of scale...
1 m = 100cm (X100)
1 cm = 10mm (x10)
1mm = 1000um (x1000)
1um = 1000nm (x1000)

How to work out magni cation...
• from a drawing - magni cation = Image/actual
• Using eyepiece graticule units - to work out the value of each eyepiece unit, nd a point where the eye
piece graticule units matches with the micrometers stage division - then divide the stage micrometer eBay
the eyepiece units to get the value. Now nd how many eyepiece units the image is and times by the value
created .

Resolution - the ability to distinguish between two separate points (the greater the resolution, the greater the
detail).
Magni cation - how enlarged the image is, but this doesn’t improve the resolution.

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Study Level
A/AS Level
Subject
Biology
Uploaded on
November 19, 2022
Number of pages
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2021/2022
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