Questionman
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Can someone explain the need for staining samples for use in light microscopy and electron microscopy? For say 3/4 marks?
Thanks
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Tillybop
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(Original post by Questionman)
Can someone explain the need for staining samples for use in light microscopy and electron microscopy? For say 3/4 marks?
Thanks
Staining makes everything clearer. The sample alone will not be easy to view - because normally they're fairly transparent. Therefore staining is added, and the staining allows you to see the different features and structures much more easily.
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Questionman
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(Original post by Tilly-Elizabeth)
Staining makes everything clearer. The sample alone will not be easy to view - because normally they're fairly transparent. Therefore staining is added, and the staining allows you to see the different features and structures much more easily.
Thank You. Going through the spec and want EVERYTHING to be spot on!
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Shadoo
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(Original post by Questionman)
Thank You. Going through the spec and want EVERYTHING to be spot on!
It provides contrast and allows you to differentiate further between features of the sample. It allows you to identify whether certain substances are present or not
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sayshay
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hi, sorry to sorta hijack the thread but could anyone help with q1 c iii) on this Unit 1 OCR paper:

http://www.ocr.org.uk/Images/59658-q...-transport.pdf

Idk if i'm overcomplicating it but the mark scheme says:3.75 / 3.8
OR
actual length = 20 x 15 / 80
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