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Which of the following is NOT equal to 1 m?
a) 10 um
b) 10 um
c) 10 dm (decimeter)
d) 100 mm
e) 0.001 km
e) 0.001 km
What structure does light pass through after leaving the condenser in a compound light microscope?
Place the steps of the Gram stain in the correct order:
1- Alcohol-acetone; 2-Crystal violet; 3-Safranin;
The purpose of a mordant in the Gram stain is
d) To prevent the crystal violet from leaving the cells.
The best use of a negative stain is
e) A and B
a) To determine cell size.
b) To determine cell shape.
Simple staining is often necessary to improve contrast in this microscope.
a) Compound light microscope
Which microscope is used to see internal structures of cells in a natural state?
b) Phase-contrast microscope
This microscope produces an image of a light cell agianst a dark background; internal structures are NOT visible.
c) Darkfield microscope
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