Imagine that you are Gram staining a mixed culture of both gram-positive and gram-negative bacteria. If you omitted the iodine (mordant) step in the procedure, what colors would the bacteria on your slide appear to be?

Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
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Imagine that you are Gram staining a mixed culture
of both gram-positive and gram-negative
bacteria. If you omitted the iodine
(mordant) step in the procedure, what
colors would the bacteria on your slide
appear to be?
►
The gram-positive bacteria would be
purple, and the gram-negative would be
pink
All of the bacteria would look purple
All of the bacteria would look pink
The bacteria would not be stained at all
(clear)
Transcribed Image Text:Imagine that you are Gram staining a mixed culture of both gram-positive and gram-negative bacteria. If you omitted the iodine (mordant) step in the procedure, what colors would the bacteria on your slide appear to be? ► The gram-positive bacteria would be purple, and the gram-negative would be pink All of the bacteria would look purple All of the bacteria would look pink The bacteria would not be stained at all (clear)
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