When working with broth (liquid) culture tubes, before taking a sample of the culture you
must
perform which aseptic techniques during the procedure?
(Select all that apply)
Open a fresh pipetter.
Flame the mouth of the tube.
Flame the inoculating loop until it is red hot then allow it to cool.
Wipe off the mouth of the tube with paper towel.

Aseptic techniques such as flaming the tube's mouth and sterilizing the inoculating loop are vital to prevent contamination when working with broth culture tubes.

Explanation:

Aseptic techniques are crucial when working with broth culture tubes to prevent contamination. Some aseptic techniques required include flaming the mouth of the tube before and after sampling, sterilizing the inoculating loop by flaming until red hot, and replacing the cap on the tube immediately after sampling.

Learn more about Aseptic techniques in microbiology here:

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