Microbiology 020 - General Microbiology » Spring 2021 » Lab Quiz 2 Gram Stain

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Question #1
What color is a Gram -?
A.   Blue
B.   Red
C.   Purple
D.   Green
Question #2
What dyes are used in a Gram stain?
A.   Acetone/alcohol
B.   Crystal Violet, Safranin
C.   Crystal Violet, Safranin, Crystal violet, methylene blue and Acetone/alcohol
D.   Crystal violet, methylene blue
Question #3
What is the decolorizer/ destain for the Gram stain?
A.   acid/ acetone
B.   acid/alcohol
C.   acetone/alcohol
D.   acetone/phenol
Question #4
Which ingredient sets the stain?
A.   Crystal violet
B.   Acetone/alcohol
C.   Safranin
D.   Iodine

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