BIOL 2051 lab quizzes 1-4 Questions with 100% Verified
Answers Latest Update
Question: What method of sterilization is used to sterilize the media you use in the lab?
Select one:
a. electromagnetic radiation
b. gas
c. filtration
d. moist heat sterilization
Answer:
d. moist heat sterilization
Question: Allergies have been bothering you lately. As you were inoculating your streak
plate with E. coli you sneeze. With a plate in one hand and an inoculating loop in the other
you were unable to quickly cover your mouth. You tried to sneeze into your arm but your
unstifled sneeze was greater than your arm could shield. Following incubation of your plate,
what do you expect to see on the plate next lab? Select one or more:
a. Nothing because you did not inoculate the plate.
b. There will be E. coli along with bacteria from your mouth on the plate.
c. Nothing because the media in the plate was sterilized.
d. Microorganisms are in the air transiently so there could be growth from contaminates in
the air.
Answer:
b. There will be E. coli along with bacteria from your mouth on the plate.
d. Microorganisms are in the air transiently so there could be growth from contaminates in
the air.
Question: Which of the following term describe the optical properties of a colony? Select
one:
a. translucent
b. dull
c. shiny
d. irregular
Answer:
a. translucent
Question: Which of the following terms describe the whole colony shape of a colony? Select
one:
a. umbonate
b. lobate
c. filamentous
d. round
Answer:
, d. round
Question: Which of following is used to determine colony morphology of a microorganism?
Select one or more:
a. your eye
b. a colony
c. a microscope
d. a broth culture
Answer:
a. your eye
b. a colony
Question: When you calculate population standard deviation, you divide the squared
differences by the total number of population observations. Select one: True False
Answer:
True
Question: What is the correct order of events in demonstrating aseptic technique to prepare
a smear from a broth culture? (You may use an answer choice more than once if needed.
Your answer needs to be written with no spaces between letters; for example: abcdefgh)
a. Replace the cap on the test tube;
b. Allow loop to cool;
c. Remove a loopful of microorganisms from the broth;
d. Heat the loop and wire until red hot;
e. Place a loopful of microorganisms onto the slide;
f. Flame the mouth of the culture tube;
g. Gently shake the broth culture to suspend the microorganisms;
h. Remove the cap from the tube.
Answer:
gdbhfcfaed
Question: In preparing most smears, heat fixation is done before staining. What does heat
fixation do to the bacteria placed on the microscope slide? Select one or more:
a. Sticks the bacteria to the slide
b. Kills the bacteria
c. Lyses the bacteria
d. Allows enzymes and other cellular processes to continue
Answer:
a. Sticks the bacteria to the slide
b. Kills the bacteria
Question: A smear can be made from Select one:
a. Bacteria growing on a solid medium
Answers Latest Update
Question: What method of sterilization is used to sterilize the media you use in the lab?
Select one:
a. electromagnetic radiation
b. gas
c. filtration
d. moist heat sterilization
Answer:
d. moist heat sterilization
Question: Allergies have been bothering you lately. As you were inoculating your streak
plate with E. coli you sneeze. With a plate in one hand and an inoculating loop in the other
you were unable to quickly cover your mouth. You tried to sneeze into your arm but your
unstifled sneeze was greater than your arm could shield. Following incubation of your plate,
what do you expect to see on the plate next lab? Select one or more:
a. Nothing because you did not inoculate the plate.
b. There will be E. coli along with bacteria from your mouth on the plate.
c. Nothing because the media in the plate was sterilized.
d. Microorganisms are in the air transiently so there could be growth from contaminates in
the air.
Answer:
b. There will be E. coli along with bacteria from your mouth on the plate.
d. Microorganisms are in the air transiently so there could be growth from contaminates in
the air.
Question: Which of the following term describe the optical properties of a colony? Select
one:
a. translucent
b. dull
c. shiny
d. irregular
Answer:
a. translucent
Question: Which of the following terms describe the whole colony shape of a colony? Select
one:
a. umbonate
b. lobate
c. filamentous
d. round
Answer:
, d. round
Question: Which of following is used to determine colony morphology of a microorganism?
Select one or more:
a. your eye
b. a colony
c. a microscope
d. a broth culture
Answer:
a. your eye
b. a colony
Question: When you calculate population standard deviation, you divide the squared
differences by the total number of population observations. Select one: True False
Answer:
True
Question: What is the correct order of events in demonstrating aseptic technique to prepare
a smear from a broth culture? (You may use an answer choice more than once if needed.
Your answer needs to be written with no spaces between letters; for example: abcdefgh)
a. Replace the cap on the test tube;
b. Allow loop to cool;
c. Remove a loopful of microorganisms from the broth;
d. Heat the loop and wire until red hot;
e. Place a loopful of microorganisms onto the slide;
f. Flame the mouth of the culture tube;
g. Gently shake the broth culture to suspend the microorganisms;
h. Remove the cap from the tube.
Answer:
gdbhfcfaed
Question: In preparing most smears, heat fixation is done before staining. What does heat
fixation do to the bacteria placed on the microscope slide? Select one or more:
a. Sticks the bacteria to the slide
b. Kills the bacteria
c. Lyses the bacteria
d. Allows enzymes and other cellular processes to continue
Answer:
a. Sticks the bacteria to the slide
b. Kills the bacteria
Question: A smear can be made from Select one:
a. Bacteria growing on a solid medium
