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AQA 4.1.1.6 Culturing Microorganisms
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GCSE Science Unlocked by Dan Hawksley
Episode notes
Ever looked at a photograph of what looked like a furry, fluorescent green archipelago growing in a plastic dish? While Lottie thinks it looks poetic, Mr. H is here to remind us that calling it an "archipelago" on an exam will get you exactly zero marks. It’s a bacterial colony, and today we are unlocking Section 4.1.1.6: Culturing Microorganisms.
In this episode, we tackle the ultimate practical test: how to grow bacteria safely without accidentally culturing a dangerous pathogen. We walk step-by-step through a classic six-mark exam question, break down the strict safety rules of a school lab, and dive into the vital mathematics of exponential growth.
🎧 What We Cover in This Episode:
- The Nutrient Hotel: The difference between a nutrient broth solution and an agar gel plate (and why you sh ...
Keywords
Culturing microorganisms GCSEAseptic technique biologyGrowing bacteria GCSEAQA Biology agar platesGCSE Biology specification 4.1.1.6Zone of inhibition calculation GCSEInoculating loop sterilizationNutrient broth vs agar gelWhy incubate bacteria at 25 degreesHuman pathogens incubation risk