Suppose You Perform a Gram Stain of a Mixed Culture

question 23

Multiple Choice

Suppose you perform a Gram stain of a mixed culture of Gram-positive and Gram-negative cells, and afterwards you realize that you omitted the iodine step. What would you expect to see if you observed the slide under the microscope?

• A)colourless Gram-positive and pink Gram-negative cells
• B)purple Gram-positive and pink Gram-negative cells
• C)pink Gram-positive and pink Gram-negative cells
• D)colourless Gram-positive and colourless Gram-negative cells

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