Bio 2010 - Microbiology » Summer 2021 » Streak for Isolation Technique

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Question #1
Which of the following would be considered a next step application for any isolated colonies on your streak-for-isolation plate?
A.   identification
B.   more than one of the above is correct
C.   incubation inspection
D.   inspection
E.   inoculation
F.   none of the above is correct
Question #2
Which of the following sectors/quadrants of our Streak-for-Isolation plate should have ISOLATED COLONIES growing in it?
A.   II
B.   0
C.   I
D.   III
Question #3
After making and incubating your Streak-for-Isolation plate a student notices that they have confluent growth in EVERY sector/quadrant. Which of the following most likely explains what happened?
A.   the bacteria spread through each sector during incubation
B.   they left the top of the Petri open too long during making the streak
C.   the tryptic soy agar plate was contaminated prior to making the streak
D.   they returned the flame loop to the broth between every sector/quadrant
Question #4
What does the streak technique enable us to achieve?
A.   visualization of virus plaques
B.   direct spread and dilution of bacteria from a single colony
C.   isolation of bacterial colonies
D.   development of antibacterial microbes
Question #5
Which of the following observations would suggest that a plate was inoculated with a pure culture?
A.   bacterial growth is apparent in all four quadrants.
B.   isolated colonies are all white in color, but some colonies are noticeably larger than others.
C.   isolated colonies have uniform color and same size.
D.   bacterial growth is apparent along the streaks connecting each quadrant.

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