Microbiology Quiz #1

What is used as a decolourizer in gram staining?

What is used as a primary stain in gram staining?

What is used as a mordant in gram staining?

RNA which forms peptide bonds and performs cellular work and respiration

Dye which carries a negative charge

Type of microscope which uses excitation with light of a specific wavelength to cause a fluorescent protein to emit longer wavelength light.

Rock-like structures in shallow water formed by microbes

Ability of a lens to distinguish between 2 points

Type of microscope which creates sharp, composite 3D image of specimens by using laser beam, aperture to eliminate stray light, and computer interface

Specific set of growth requirements for a microbe

Which type of bacteria caused the great oxygenation event?

Measure of how greatly a substance slows velocity of light

Rapid freezing technique providing a way to preserve native state of structures examined in vacuum

Species of microbe which relies on metabolic activity of other organisms to grow

Dye which carries a positive charge

Fixation which is routinely used with bacteria and archaea, preserves overall morphology but not internal structures

Which staining method is useful for staining bacteria of the genus Mycobacterium due to the high lipid content of their cell walls?

Type of microscope which converts differences in refractive index/cell density into detected variations in light intensity

Microbe which inhabits hostile environments

Type of microscopy which uses subatomic particles instead of light

What is used as a counterstain in gram staining?

Fixation used with larger, more delicate organisms which protects fine cellular substructure and morphology

A ____ lens can be used to focus light at a specific point