What is a biological stain used for in microscopy?

A biological stain is primarily used in microscopy to enhance the visibility of specific features within a microscopic specimen. Staining techniques enable scientists to highlight various components of cells and tissues, such as organelles, membranes, and structures that may otherwise be difficult to discern against a clear background. This staining process increases contrast, allowing for a clearer and more detailed observation of biological materials under a microscope.

Different stains can be used to target particular types of cells or structures, depending on the properties they possess. For example, some stains bind to nucleic acids, while others may highlight proteins or specific cellular components. This differentiation is crucial for analyzing specimens in various fields, including histology, microbiology, and pathology. Therefore, utilizing biological stains is essential for accurate identification and study of microscopic entities.