1
BIOL 2444 Lab Questions with Correct
Answers | Updated (100% Correct Answers)
According to the CDC, how long should you wash your hands for?
a. 20 seconds
b. 15 seconds
c. 10 seconds
d. none of these answers are correct Answer: a. 20 seconds
Examine the following data from a series of pipetting. The target for
this series was 250 microliters. Which is the best conclusion you can
make?
TRIAL | VOLUME
#1 | 350 microliters
#2 | 375 microliters
#3 | 370 microliters
average = 365 microliters
standard deviation = 13.23 microliters
a. The pipetting was not accurate or precise
© 2025 All rights reserved
,2
b. The pipetting was both completely accurate and precise
c. The pipetting was completely precise but not accurate
d. The pipetting was completely accurate but not precise Answer: a.
The pipetting was not accurate or precise
The microbiology lab classrooms are considered what level of
biosafety?
a. BSL-2
b. BSL-1
c. BSL-3
d. BSL-4 Answer: a. BSL-2
How many microliters are there in 1 mL?
a. 1000
b. 100
c. 10
d. 0.1 Answer: a. 1000
What best describes aseptic technique?
© 2025 All rights reserved
, 3
a. The combination of protocols used to prevent contamination of
unwanted microbes
b. The method used to transfer volumes of liquid close to true or
nominal value
c. The area in the lab that is free of all vegetative cells, endospores,
and viruses Answer: a. The combination of protocols used to
prevent contamination of unwanted microbes
Cell morphology refers to the pattern that forms during cellular
division.
a. True
b. False Answer: b. False
In streak plate isolation, the number of bacteria is reduced between
each section of the plate.
a. True
b. False Answer: a. True
What is the total magnification when viewing a microscope with a
100x objective lens and a 10x ocular lens?
a. 100x
b. 10x
© 2025 All rights reserved
BIOL 2444 Lab Questions with Correct
Answers | Updated (100% Correct Answers)
According to the CDC, how long should you wash your hands for?
a. 20 seconds
b. 15 seconds
c. 10 seconds
d. none of these answers are correct Answer: a. 20 seconds
Examine the following data from a series of pipetting. The target for
this series was 250 microliters. Which is the best conclusion you can
make?
TRIAL | VOLUME
#1 | 350 microliters
#2 | 375 microliters
#3 | 370 microliters
average = 365 microliters
standard deviation = 13.23 microliters
a. The pipetting was not accurate or precise
© 2025 All rights reserved
,2
b. The pipetting was both completely accurate and precise
c. The pipetting was completely precise but not accurate
d. The pipetting was completely accurate but not precise Answer: a.
The pipetting was not accurate or precise
The microbiology lab classrooms are considered what level of
biosafety?
a. BSL-2
b. BSL-1
c. BSL-3
d. BSL-4 Answer: a. BSL-2
How many microliters are there in 1 mL?
a. 1000
b. 100
c. 10
d. 0.1 Answer: a. 1000
What best describes aseptic technique?
© 2025 All rights reserved
, 3
a. The combination of protocols used to prevent contamination of
unwanted microbes
b. The method used to transfer volumes of liquid close to true or
nominal value
c. The area in the lab that is free of all vegetative cells, endospores,
and viruses Answer: a. The combination of protocols used to
prevent contamination of unwanted microbes
Cell morphology refers to the pattern that forms during cellular
division.
a. True
b. False Answer: b. False
In streak plate isolation, the number of bacteria is reduced between
each section of the plate.
a. True
b. False Answer: a. True
What is the total magnification when viewing a microscope with a
100x objective lens and a 10x ocular lens?
a. 100x
b. 10x
© 2025 All rights reserved
