Useful micro-organisms (making yogurt) Flashcards
1
Q
How do we use microbes to our advantage?
A
Making yogurt
1
Q
Fermentation of milk involves bacteria eating the sugar, lactose, and converting this into an acid. Complete the equation below:
A
Lactose —(bacteria)——— type of acid ( lactic acid)
2
Q
What caused the change from milk to yoghurt?
A
The milk sours
3
Q
What is this process called?
A
Fermentation
4
Q
What is the type of microbes which can be used to make yoghurt?
A
Bacteria
5
Q
Why would it take longer to make yoghurt at 20°C than at 40°C?
A
It takes longer for the bacteria to grow
6
Q
A sterile spoon is used to stir the mixture before incubating, what do you think might happen if a dirty spoon was used?
A
Added bad bacteria
