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GCSE Combined Science · key term
A clear region around an antimicrobial disc on an agar plate where visible microbial growth has been prevented.
Used by OCR
Specification B5 · Biology Paper 1, Biology Paper 2, Chemistry Paper 1, Chemistry Paper 2, Physics Paper 1, Physics Paper 2
Revise: Microbiological TechniquesIf a substance inhibits growth, a clear zone of inhibition may surround its disc. Measure this through the closed dish rather than opening the culture.
Specification B5 · Biology, Chemistry, Physics, Combined Science
A clear region around an antimicrobial disc on a culture plate where visible microbial growth has been prevented.
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If an extract inhibits growth, a clear zone of inhibition develops around its disc. Measuring this zone turns an observation into a numerical result.
