Bio 2010 - Microbiology » Fall 2021 » Gram Stain technique

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Question #1
Which of the following is the Gram's secondary stain?
A.   Crystal violet
B.   Safranin
C.   Bacillus
Question #2
Which of the following is used as a primary stain in Gram stain?
A.   Safranin
B.   Bacillus
C.   Crystal violet
Question #3
You forgot to use the safranin in your Gram staining. Which of the following would be a possible consequence?
A.   Gram negative will not be stained
B.   Gram positive will not be stained
C.   Both gram positive and Gram negative will appear purple

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