Chemistry

General Science (CHSL)

Title

45:30

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Which biological stain is used in histology and cytology to colour all cell nuclei red?

This questions was previously asked in

SSC CHSL 6th June 2022 Shift-3

Methyl orange

Safranin

Phenolphthalein

Cresol red

- Methyl orange is primarily used as a pH indicator in titrations, not for staining cell nuclei.

- Safranin is often used in histology and cytology for staining cell nuclei red, particularly in plant tissues.

- Phenolphthalein is also a pH indicator, used to demonstrate acidity and basicity in chemical solutions.

- Cresol red is another pH indicator and not typically used for biological staining.