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Terms in this set (19)
You are observing a bacterium using a 10X ocular lens and a 45X objective lens. What would the total magnification be?
Which microscope uses a laser a light source?
What color are Gram-negative bacteria at the completion of the Gram staining process?
What is the correct order of reagents in the Gram stain?
crystal violet, iodine, ethanol, safarin
Which of the following microscopes allows the best view of bacterial movement?
The lipopolysaccharide (LPS) that is found in the outer membrane of of gram-negative bacteria is also known as:
What structure protects pathogenic bacteria from phagocytosis?
Molecules of extrachromosomal DNA are also known as:
Which of the following structures allows a cell to survive adverse environmental conditions?
Prokaryotic ribosomes are composed of two subunits of what sizes?
30S + 50S
The plasma membrane of eukaryotes contains all of the following except:
Which of the following is a function of the mitochondrion?
ALL (tricarboxylic acid cycle enzyme, electron transport, atp synthesis)
Which of the following uses sunlight for energy and CO2 as a carbon source?
What is the fastest way to measure cell density?
What shortest lag period would most likely be observed if a culture is transferred?
From a complex medium to a fresh complex medium
Microbes that grow at temperatures between 40 and 80 degC are called:
Bacteria cannot grow in solutions with very high concentrations of sugar because:
sugar raises the solution's osmolarity
To sterilize heat-labile (sensitive) solutions, one should use:
Ethanol can be used as an effective bactericide when used at a concentration of:
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