Micro 020 - General Microbiology » Winter 2021 » Lab Quiz 2 Gram Stain

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Question #1
What color is a Gram +?
A.   Purple
B.   Blue
C.   Pink
D.   Red
Question #2
What color is a Gram -?
A.   Blue
B.   Green
C.   Red
D.   Purple
Question #3
What dyes are used in a Gram stain?
A.   Crystal violet, methylene blue
B.   Crystal Violet, Safranin
C.   Acetone/alcohol
Question #4
What is the decolorizer/ destain for the Gram stain?
A.   acetone/phenol
B.   acetone/alcohol
C.   acid/alcohol
D.   acid/ acetone
Question #5
Which ingredient sets the stain?
A.   Acetone/alcohol
B.   Iodine
C.   Safranin
D.   Crystal violet

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