Staining makes cells more visible by increasing which of the following?

• A. contrast between the cells and the background
• B. the size of the cells
• C. the temperature of the slide
• D. the number of cells present

Answer: (A)

Verified step by step guidance

1. Understand the purpose of staining in microbiology: staining is used to make cells more visible under a microscope by altering how they interact with light.
2. Recognize that staining does not change the physical size of the cells, so it does not increase the size of the cells.
3. Note that staining does not affect the temperature of the slide or the number of cells present on the slide.
4. Focus on the concept of contrast, which is the difference in light intensity between the cells and the background, making cells easier to see.
5. Conclude that staining increases the contrast between the cells and the background, thereby enhancing visibility.