Question:

Basic dyes are used in microbiological staining. Which of the following statement is wrong about mechanism of staining?

Updated On: Oct 9, 2024

The positive ions on the surface of bacteria form a coloured complex with the dye
Ionic exchange between the negative charge on the bacteria and positive charge of dye takes place
Ionic exchange between the positive charge on the bacteria and negative charge of dye takes place
The neutral charge on the surface of bacteria forms a coloured complex with the basic dye

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The Correct Option is D

The correct option is (D): The neutral charge on the surface of bacteria forms a coloured complex with the basic dye

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Antibody	Description
P. IgE	(i) Cross the placenta
Q. IgG	(ii) Dominant antibody produced in immune responses
R. IgM	(iii) It is found in the mother's milk
S. IgA	(iv) Responsible for autoimmune responses including allergies

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