Biology GCSE
negative control verification
What negative control verification means in Biology GCSE, as defined for OCR.
Definition of negative control verification
Check what you remember
Read the wording for your board, then hide it and explain negative control verification in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
A control disc soaked in sterile water is placed alongside the test discs to prove that the paper disc itself did not inhibit bacterial growth.
Topics that use negative control verification
- Microbiological techniques (OCR GCSE)
Related terms
- convection current
- differential staining and contrast
- disc diffusion antimicrobial assay
- high-power microscopic resolution
- mass, gas volume and pH measurement
- microbial smear preparation and heat-fixing
- microbiological scientific drawing
- safe zone measurement through closed dish
Using negative control verification in the exam
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