Which of the Following Explains Why It Is Necessary to Use

question 1

Multiple Choice

Which of the following explains why it is necessary to use safranin in the Gram stain?

• A)Gram-positive bacteria do not have a strong affinity for crystal violet, but do bind well to safranin
• B)Gram-negative bacteria are rendered colorless after the decolorizer is added, and need to be counterstained to be visible under the microscope
• C)Safranin is the mordant needed to set the crystal violet color and make it permanent
• D)Gram-variable cells do not bind to crystal violet and need to be counterstained to be visible under the microscope
• E)None of the choices are true

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