Microbiology 3

Place the following steps in the correct order?

1-staining; 2-smear; 3-fixation

• 1-2-3

• 2-1-3

• 1-3-2

• 2-3-1

Which microscope achieves the highest magnification and resolution?

• Electron

• Brightfield

• Darkfield

• Fluorescence

The resolution of a microscope can be improved by changing the

• Fine adjustment.

• Diaphragm.

• Condenser.

• Resolution.

• Coarse adjustment.

Positive staining uses

• Acidic dyes.

• Negative charged dyes.

• Basic dyes.

• None of the above.

After Gram stain, gram negative bacteria will stain

• Green

• Red

• Purple

• Blue

• Colorless

Which kind of microscope reveals bacteria as dark objects against a bright background?

• Darkfield

• Brightfield

• Fluorescence

• Electron

In which microscope does the image look like a negative stain?

• Fluorescence

• Brightfield

• Electron

• Darkfield

Which of the following uses a special type of slide?

• Wet mount

• Fixed mount

• Hanging drop mount

Cations are

• No charge

• Positive

• Negative

CHROMagar is

• Enriched

• Selective

• Differential

• Reducing