1) Chemical fixation in the preparation of biological specimens for TEM is prima
ID: 264602 • Letter: 1
Question
1) Chemical fixation in the preparation of biological specimens for TEM is primarily used to examine which one of the following types of samples?
Crystalline samples
Particulate samples
Freeze-etched material
Metal-shadowed material
Tissue samples
Vitrified specimens
2) In TEM, elastic scattering involves interactions between electrons in the illuminating beam and which one of the following in the specimen atoms?
Nuclei
Free radicals
Ions
Electrons
Empty space
3) Negative stains in TEM are mostly used to examine which one of the following types of specimen samples?
Tissue samples
A suspension of cells (like bacteria)
Particulate samples
Freeze-etched material
Vitrified specimens
a.Crystalline samples
b.Particulate samples
c.Freeze-etched material
d.Metal-shadowed material
e.Tissue samples
f.Vitrified specimens
Explanation / Answer
1) Chemical fixation in the preparation of biological specimens for TEM is prima
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