Question
Pharmaceutics Question on Cosmetics
Basic dyes are used in microbiological staining. Which of the following statement is wrong about mechanism of staining?
A
The positive ions on the surface of bacteria form a coloured complex with the dye
B
Ionic exchange between the negative charge on the bacteria and positive charge of dye takes place
C
Ionic exchange between the positive charge on the bacteria and negative charge of dye takes place
D
The neutral charge on the surface of bacteria forms a coloured complex with the basic dye
Answer
The neutral charge on the surface of bacteria forms a coloured complex with the basic dye
Explanation
Solution
The correct option is (D): The neutral charge on the surface of bacteria forms a coloured complex with the basic dye