Question
Choose the basic dye among the following :
This question was previously asked in
CUET PG 2026 Agri-Business Management Question Paper (25-Mar-2026) (Shift 2)
The correct answer is
Methylene blue
Identifying the Basic Dye
The question asks to identify the basic dye from the given options. Basic dyes are cationic (positively charged) and typically stain acidic cellular components (like nucleic acids in the nucleus) blue or purple.
Dye Classification Analysis
Let's analyze each option:
- Methylene blue: This is a well-known basic dye. It is cationic and commonly used in histology and medicine.
- Eosin: This is an anionic dye, meaning it is acidic. It stains basic cellular components (like cytoplasmic proteins) pink or red.
- Rose bengal: Similar to Eosin, Rose bengal is an anionic (acidic) dye used in staining.
- Acid Fuchsin: As the name suggests, this is an acidic dye (anionic).
Conclusion
Based on the classification, Methylene blue is the only basic dye among the options provided.
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