Microbiology 2117 Sample Questions and Answers
100% Correct
An antiseptic
is used on the skin
Would an autoclave be a good way to sterilize surgical instruments?
yes
Would an autoclave be a good way to sterilize blood before a blood transfusion?
no
How are the plates incubated?
upside-down
A typical pressure in your car tire is around 35psi. Is that higher or lower than the
pressure in the autoclave?
higher
If someone tells you that a certain item has been disinfected, you assume that
there are only a few microorganisms or viruses present
A chemical that kills all microorganisms and viruses would be called a
sterilant
What is the purpose of a spread plate?
isolate and grow colonies
,MSDS (also referred to as Safety Data Sheets), are available for all chemicals used in
microbiology lab.
true
Beakers of ethanol should be kept away from the Bunsen burner flames
true
What is attached to the nosepiece of the microscope?
objectives
The total magnification using the yellow objective would be
100x
The coarse adjustment knob is used with
red and yellow objectives
A single round bacterium is called a
coccus
In order to clean the objectives, students should
use dry lens paper
We will primarily view bacteria at this total magnification:
1000X
When a microscope is put back into the cabinet, which objective should be moved over the
stage?
, red
The microscope slide is placed directly onto the
stage
To enhance the contrast between the specimen and surrounding structures, which of the
following parts of the microscope would be most useful:
iris diaphragm
red
magnification 4x
total magnification 40x
yellow
magnification 10x
total magnification 100x
blue
magnification 40x
total magnification 400x
black
magnification 100x
total magnification 1000x (with oil immersion)
shapes of bacteria
100% Correct
An antiseptic
is used on the skin
Would an autoclave be a good way to sterilize surgical instruments?
yes
Would an autoclave be a good way to sterilize blood before a blood transfusion?
no
How are the plates incubated?
upside-down
A typical pressure in your car tire is around 35psi. Is that higher or lower than the
pressure in the autoclave?
higher
If someone tells you that a certain item has been disinfected, you assume that
there are only a few microorganisms or viruses present
A chemical that kills all microorganisms and viruses would be called a
sterilant
What is the purpose of a spread plate?
isolate and grow colonies
,MSDS (also referred to as Safety Data Sheets), are available for all chemicals used in
microbiology lab.
true
Beakers of ethanol should be kept away from the Bunsen burner flames
true
What is attached to the nosepiece of the microscope?
objectives
The total magnification using the yellow objective would be
100x
The coarse adjustment knob is used with
red and yellow objectives
A single round bacterium is called a
coccus
In order to clean the objectives, students should
use dry lens paper
We will primarily view bacteria at this total magnification:
1000X
When a microscope is put back into the cabinet, which objective should be moved over the
stage?
, red
The microscope slide is placed directly onto the
stage
To enhance the contrast between the specimen and surrounding structures, which of the
following parts of the microscope would be most useful:
iris diaphragm
red
magnification 4x
total magnification 40x
yellow
magnification 10x
total magnification 100x
blue
magnification 40x
total magnification 400x
black
magnification 100x
total magnification 1000x (with oil immersion)
shapes of bacteria
