BIOL 2444 Lab Exam Questions with Correct Answers Latest Update 2025/2026
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 - Answers 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
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 - Answers 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 - Answers a. BSL-2
How many microliters are there in 1 mL?
a. 1000
b. 100
c. 10
d. 0.1 - Answers a. 1000
What best describes aseptic technique?
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 - Answers 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 - Answers b. False
In streak plate isolation, the number of bacteria is reduced between each section of the plate.
a. True
b. False - Answers a. True
What is the total magnification when viewing a microscope with a 100x objective lens and a 10x
ocular lens?
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 - Answers 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
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 - Answers 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 - Answers a. BSL-2
How many microliters are there in 1 mL?
a. 1000
b. 100
c. 10
d. 0.1 - Answers a. 1000
What best describes aseptic technique?
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 - Answers 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 - Answers b. False
In streak plate isolation, the number of bacteria is reduced between each section of the plate.
a. True
b. False - Answers a. True
What is the total magnification when viewing a microscope with a 100x objective lens and a 10x
ocular lens?
