Biology GCSE
differential staining and contrast
What differential staining and contrast means in Biology GCSE, as defined for OCR.
Definition of differential staining and contrast
Check what you remember
Read the wording for your board, then hide it and explain differential staining and contrast in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Applying stains such as crystal violet or methylene blue to provide contrast against cell walls and cytoplasm of colourless microbial cells.
Topics that use differential staining and contrast
- Microbiological techniques (OCR GCSE)
Related terms
- convection current
- disc diffusion antimicrobial assay
- high-power microscopic resolution
- mass, gas volume and pH measurement
- microbial smear preparation and heat-fixing
- microbiological scientific drawing
- negative control verification
- safe zone measurement through closed dish
Using differential staining and contrast in the exam
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