Biology GCSE
Valid comparison
What Valid comparison means in Biology GCSE, as defined for AQA.
Definition of Valid comparison
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Read the wording for your board, then hide it and explain Valid comparison in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
A comparison of disinfectants or antibiotics in which all plates start with the same pure culture and are treated identically apart from the variable being tested.
Topics that use Valid comparison
- Culturing microorganisms (biology only) (AQA GCSE)
Related terms
- Agar gel plate
- Analysis and interpretation of data
- Antibiotic clear zones
- Antibiotic resistance
- Aseptic technique
- Aseptic technique and risk management
- Aseptic technique and safe culturing
- Binary fission
Using Valid comparison in the exam
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