Preservatives, Stains and Reagents
Telangana Open School (TOSS) · Class 12 · Biology
Complete topic list for Preservatives, Stains and Reagents in Telangana Open School (TOSS) Class 12 Biology. Key concepts, sub-topics, and what to focus on for board exams.
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Topics in Preservatives, Stains and Reagents
Preservatives
- Preservatives prevent decay and decomposition of biological tissues.
- They fix tissues quickly and maintain structural integrity for microscopic study.
- Common preservatives include Bouin's fluid, Carnoy's fluid, and FAA (Formalin Acetic Alcohol).
Stains
- Stains are chemical dyes used to make cellular components visible under the microscope.
- Types of staining: Single, Double, Multiple, and Vital staining.
- Acetocarmine stains chromosomes pink and is used in mitosis studies.
Reagents
- Reagents are chemicals used to detect specific substances in biological samples.
- Benedict’s and Fehling’s solutions test for reducing sugars.
- Iodine solution detects starch by turning it blue-black.
Key Concepts
Central concept: Chemicals Used in Biological Studies
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