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HT Histotechnician

Category - Fixation

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All of the following choices below are fixatives of choice for electron microscopy, except:

100% Methanol
Osmium Tetroxide
Glutaraldehyde
Paraformaldehyde

Explanation

Answer: A - 100% Methanol
All of the following choices above are fixatives of choice for electron microscopy except for 100% Methanol. Methanol penetrates the tissue gradually and might not penetrate the tissue deeper. It is only recommended for the preservation of dry and wet smears.

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