- to observe the nucleus in cheek cells
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When it comes in contact with the two, a darker stain is produced and can be viewed under the microscope. The nucleus at the central part of the cheek cell contains DNA. When a drop of methylene blue is introduced, the nucleus is stained, which makes it stand out and be clearly seen under the microscope.
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take a clean tooth pick, or a match stick with the tip broken. Scrape inside of your cheek without hurting it. Place it in a drop of water on a glass slide. alternatively add 1-2 drop of methylene blue solution. observe it under microscope.
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