Microbiology 2117 Midterm Test 1 Questions and
Answers 100% Correct
arm
Supports the body and stage and is attached to the base
base
supports the microscope
stage
flat surface that holds the microscope slide in position
substage light
light source of microscope
condenser
concentrates light directly through the specimen
iris diaphragm
increases or decreases the light intensity/contrast
oil immersion
allows you to see the specimen at 100x (1000 total magnification)
objective lenses
used to magnify the slide sample image
coarse adjustment knob
,Moves the stage up and down for focusing (only used for 4x and 10x, the red and yellow
objective lenses)
fine adjustment knob
Moves the stage slightly to sharpen the image (used for 40x and 100x, the blue and black
objective lenses)
nosepiece
holds the objective lenses
ocular lens
Eyepiece of a microscope
total magnification
objective lens multiplied by the ocular lens (10x)
40x
total magnification for red objective lens
100x
total magnification for yellow objective lens
400x
total magnification for blue objective lens
1000x
total magnification for black objective lens
, coccus
name the shape
bacillus
name the shape
spirilla
name the shape
spirochete
name the shape
vibrio
name the shape
bacterial capsule
name the stained bacteria cell envelope layer
peritrichous
what type of flagella
amphitrichous
what type of flagella
lophotrichous
what type of flagella
Answers 100% Correct
arm
Supports the body and stage and is attached to the base
base
supports the microscope
stage
flat surface that holds the microscope slide in position
substage light
light source of microscope
condenser
concentrates light directly through the specimen
iris diaphragm
increases or decreases the light intensity/contrast
oil immersion
allows you to see the specimen at 100x (1000 total magnification)
objective lenses
used to magnify the slide sample image
coarse adjustment knob
,Moves the stage up and down for focusing (only used for 4x and 10x, the red and yellow
objective lenses)
fine adjustment knob
Moves the stage slightly to sharpen the image (used for 40x and 100x, the blue and black
objective lenses)
nosepiece
holds the objective lenses
ocular lens
Eyepiece of a microscope
total magnification
objective lens multiplied by the ocular lens (10x)
40x
total magnification for red objective lens
100x
total magnification for yellow objective lens
400x
total magnification for blue objective lens
1000x
total magnification for black objective lens
, coccus
name the shape
bacillus
name the shape
spirilla
name the shape
spirochete
name the shape
vibrio
name the shape
bacterial capsule
name the stained bacteria cell envelope layer
peritrichous
what type of flagella
amphitrichous
what type of flagella
lophotrichous
what type of flagella
