Which of the following is stained by using 'Leuco basic dye'?

Bacteria

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Diatoms

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Chromosomes

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Viruses

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Solution

The correct option is B Chromosomes
DNA present in chromosomes is an acidic molecule having a negative charge due to phosphoric acid present as one of the components of nucleotides. Hence, it should be stained using basic dyes. Waldeyer first used the term chromosome in 1888, after staining by dye Janus green.

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Question 4

Which of the following stain is not used for staining chromosomes?

(a) Basic fuschsin (b) Safranin

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