Microbiology 020 - General Microbiology » Fall 2021 » Gram Staining Lab

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Question #1
Gram positive bacteria are stained to be ______ colored due to their thick ____.
A.   purple… cell wall.
B.   red… cell wall.
Question #2
The peptidoglycan layer in Gram positive bacteria is shrunk by Gram's _____ which allows it to absorb the ________ stain.
A.   safranin… red violet…
B.   iodine… crystal violet…
Question #3
Gram negative bacteria are stained to be _____ colored due to their thin _______ which doesn't shrink. Instead, it will absorb the _______ stain.
A.   pink…cell wall…safranin…
B.   purple…cell wall…iodine…

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