The correct answer is:
3. So that colourless sub-cellular structures can be seen.
Stains are used in microscopy to enhance the visibility of certain structures or components within a specimen. Many cellular structures are colorless and, therefore, difficult to observe under a microscope. Staining techniques involve using specific dyes that bind to particular structures or molecules, making them visible or enhancing their contrast. This allows researchers and scientists to study and analyze these sub-cellular structures, aiding in the understanding of cellular processes and functions.
Why is stain used in microscopy?
1. Because it looks pretty
2. It preserves the specimen
3. So that colourless sub-cellular structure can be seen.
4. It kills pathogens
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