Search for notes by fellow students, in your own course and all over the country.
Browse our notes for titles which look like what you need, you can preview any of the notes via a sample of the contents. After you're happy these are the notes you're after simply pop them into your shopping cart.
Title: GCSE Biology 2.7 - Microorganisms
Description: These are concise, exam-focused notes made using the WJEC specification and BBC Bitesize. (I achieved an A.) This is one of eight topics in the unit.
Description: These are concise, exam-focused notes made using the WJEC specification and BBC Bitesize. (I achieved an A.) This is one of eight topics in the unit.
Document Preview
Extracts from the notes are below, to see the PDF you'll receive please use the links above
2
...
Petri dishes and nutrient agar should be sterilised before the agar is poured
...
The Petri dish lid prevents microorganisms from the air contaminating the culture
and vice versa
...
Inoculated agar plates are incubated at 25°C in school laboratories, which
encourages growth of the culture without growing pathogens
...
The link between the number of bacterial colonies on the agar and the number of bacteria
in the original sample
•
•
One bacterium will give rise to one colony
...
The effect of temperature on the growth of bacteria
•
•
Refrigeration slows bacterial growth
...
The production of penicillin
•
•
•
•
A starter culture of the fungus Penicillium is added to a liquid nutrient culture
medium in a fermenter
...
The organism grows and secretes the antibiotic into the surrounding medium
...
21
Title: GCSE Biology 2.7 - Microorganisms
Description: These are concise, exam-focused notes made using the WJEC specification and BBC Bitesize. (I achieved an A.) This is one of eight topics in the unit.
Description: These are concise, exam-focused notes made using the WJEC specification and BBC Bitesize. (I achieved an A.) This is one of eight topics in the unit.