A level: microscopy quiz

use 'x' for a multiply sign if needed

use the word 'divide' if needed

units are not required

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Last updated: September 28, 2022

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First submitted	September 28, 2022
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Average score	9.5%
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Hint	Answer
What is one nanometre is millimetre?	0.000001
What is the formula for magnification?	Image size divided by actual size
What is the maximum magnification for an optical microscope?	x1500
What is the maximum resolution, in nm, of an optical microscope?	200
What is the formula for total magnification when using a microscope?	lens magnification x objective lens
What is the maximum magnification of an electron microscope?	x1500000
What is the maximum resolution, in um, of an electron microscope?	0.0002
Which microscope can be useful for looking at 3D structures?	Scanning electron
Which microscope, of optical or electron, involves a vacuum?	Electron
Can cells be alive in optical microscopes?	Yes
Can cells be alive in electron microscopes?	No
Which term describes the degree to which the size of an image is larger than the object itself?	Magnification
Which term describes the degree at which it is possible to distinguish between two objects that are very close together?	Resolution
Which term describes structures that look like the real cell but are the results of preserving and staining?	Artefacts
Which term describes metal particles or salts to help distinguish features?	Stains
What is the first step of cell fractionation?	Homogenisation
What is the second step of cell fractionation?	Filtration
What is the third step of cell fractionation?	Ultracentrifugation
Which of the three previous answers describes the separation of the organelles?	Ultracentrifugation
What must you keep the test tubes on to prevent enzyme action from breaking the cells?	Ice
What solution must you put the sample in to prevent osmosis?	Buffer

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