© EVERLY 2025 ALL RIGHTS RESERVED.
Microbiology Lab Quiz #1 Study Guide.
Ocular lens - Answer✔demagnifies the image formed by the objective lens
body tube - Answer✔transmits the image from the objective lens to the ocular lens
objective lenses - Answer✔primary lenses that magnify the specimen
mechanical stage - Answer✔holds the microscope slide
condenser - Answer✔focuses light through specimen
diaphragm - Answer✔controls the amount of light entering the condenser
illuminator - Answer✔light source
fine focusing knob - Answer✔used for focusing the specimen; turning the know changes the
distance between the objective lens and the specimen
microscope - Answer✔
Nutrient Broth - Answer✔When agar is added it becomes a solid medium
Agar - Answer✔extract from marine red algae, has some unique properties that make it useful in
culture media, few microbes can degrade it and it remains solid
Steam sterilization/autoclaving - Answer✔common method of sterilization which uses steam
under pressure
Petri Plates - Answer✔containing solid media provide a large surface area for examination of
colonies
inoculated - Answer✔intentionally introduced onto nutrient agar and into nutrient broth
Colony forming unit - Answer✔same microbes attach to one another
total magnification - Answer✔ocular lens magnification x objective lens magnification
field of vision - Answer✔area seen through a microscope
focal point - Answer✔where the image is formed
spherical aberration - Answer✔multiple focal points that results in fuzzy image
bacillus - Answer✔rod
Microbiology Lab Quiz #1 Study Guide.
Ocular lens - Answer✔demagnifies the image formed by the objective lens
body tube - Answer✔transmits the image from the objective lens to the ocular lens
objective lenses - Answer✔primary lenses that magnify the specimen
mechanical stage - Answer✔holds the microscope slide
condenser - Answer✔focuses light through specimen
diaphragm - Answer✔controls the amount of light entering the condenser
illuminator - Answer✔light source
fine focusing knob - Answer✔used for focusing the specimen; turning the know changes the
distance between the objective lens and the specimen
microscope - Answer✔
Nutrient Broth - Answer✔When agar is added it becomes a solid medium
Agar - Answer✔extract from marine red algae, has some unique properties that make it useful in
culture media, few microbes can degrade it and it remains solid
Steam sterilization/autoclaving - Answer✔common method of sterilization which uses steam
under pressure
Petri Plates - Answer✔containing solid media provide a large surface area for examination of
colonies
inoculated - Answer✔intentionally introduced onto nutrient agar and into nutrient broth
Colony forming unit - Answer✔same microbes attach to one another
total magnification - Answer✔ocular lens magnification x objective lens magnification
field of vision - Answer✔area seen through a microscope
focal point - Answer✔where the image is formed
spherical aberration - Answer✔multiple focal points that results in fuzzy image
bacillus - Answer✔rod
