Question

Why do we use positive and negative controls in the Gram stain? a) To determine if an unknown sample is Gram-positive or negative b) To verify that the Gram stain was performed properly c) To distinguish between Gram-positive and Gram-negative bacteria d) To exclude Gram-variable bacteria

          Why do we use positive and negative controls in the Gram stain?
a) To determine if an unknown sample is Gram-positive or negative
b) To verify that the Gram stain was performed properly
c) To distinguish between Gram-positive and Gram-negative bacteria
d) To exclude Gram-variable bacteria

Why do we use positive and negative controls in the Gram stain?
a) To determine if an unknown sample is Gram-positive or negative
b) To verify that the Gram stain was performed properly
c) To distinguish between Gram-positive and Gram-negative bacteria
d) To exclude Gram-variable bacteria

Added by Laura L.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

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Solved by Expert Saleem Javed

05/09/2022

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Step 1: Positive and negative controls are used in the Gram stain to verify that the stain was performed properly. Show more…

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Why do we use positive and negative controls in the Gram stain? a) To determine if an unknown sample is Gram-positive or Gram-negative b) To verify that the Gram stain was performed properly c) To distinguish between Gram-positive and Gram-negative bacteria d) To exclude Gram-variable bacteria