Bio 2010 - Microbiology » Summer 2021 » Aseptic Transfer Technique (C)

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Question #1
Which of the following best describes contamination?
A.   oxygen free
B.   presence of oxygen
C.   presence of carbon dioxide
D.   more than one of the above is correct
E.   presence of microorganisms
F.   none of the above is correct
Question #2
Which of the following would be the BEST time to label test tubes and Petri plates?
A.   while you are using them
B.   more than one of the above is correct
C.   after using them
D.   before you use them
E.   none of the above is correct
Question #3
You and your partner were talking during your aseptic transfer activity. You accidentally touch your hand with the flame loop while waiting for it to cool down. Fortunately, it the loop was cool to the touch and you did not burn yourself. What should you do in order to avoid contaminating the sterile media tube in your right hand?
A.   get a different flame loop
B.   start over by re-flaming the loop
C.   nothing, I showered that morning, my hand should be sterile
D.   nothing, bacteria cannot grow on the metal loop after it cools down
Question #4
Once inoculated with bacteria, how should agar Petri plates be incubated?
A.   sideways
B.   upside down
C.   more than one of the above is correct
D.   right side up
E.   none of the above is correct
Question #5
Which of the following best describes sterile media?
A.   media with low pH
B.   media free from nutrients
C.   more than one of the above is correct
D.   media free from living organisms
E.   none of the above is correct

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