Growing Microbes Flashcards
What precautions do you need to take when growing microbes
Use sterilised equipment to ensure the growth of uncontaminated cells
What is yeast
A single celled organism which can respire both aerobically and anaerobically
What does aerobic respiration produce
CO2 and water
Used to make bread rise
What does anaerobic respiration produce
Co2 and ethanol
Process known as fermentation
Used in production of beer and wine
What are bacteria used to make
Cheese and yoghurt
How is yoghurt formed
When bacteria act on lactose, producing lactic acid and changing the texture and taste of the milk
What is lactose
Sugar in milk
How is cheese made
Different type of bacteria make much more lactic acid is made and it is thicker (curds)
How can microbe production be grown on a large scale
Using fermenters
What do fermenters do
They have An oxygen supply
Stirrer to keep micro-organisms in suspension and maintain an even temp
Water cooler jacket to remove excess heat
Measuring instruments such as pH and temp gauges
How is Mycoprotein produced
By allowing the fungus ‘Fusarium’ to grow on sugar syrup in aerobic conditions
Who discovered penicillin
By Alexander Fleming
However he could mass produce it
Why is penicillium now used instead
It provides more penicillin as it’s made in a fermenter
When do moulds start making penicillin
After all nutrients are used up , so there’s a lag time between the production of the mould and antibiotic
Where do micro organisms grow?
In an agar culture medium with a carbohydrate energy source and various other vitamins minerals and proteins
