Yoghurt Flashcards
1
Q
Which bacteria is added to milk?
A
Lactobacillus
2
Q
Why is milk pasteurised?
A
Kills unwanted bacteria
3
Q
What could contamination with other bacteria lead to?
A
It could slow the yoghurt production if there is competition between Lactobacillus and other bacteria for lactose
4
Q
Would contamination with other bacteria lead to a spoiled yoghurt taste?
A
Yes
5
Q
What does lactobacillus do to lactose in the milk?
A
It turns it into lactic acid
6
Q
What does this lactic acid lead to?
A
A soured taste of the milk and thickens the milk to form yoghurt
7
Q
What does the lowered pH prevent the growth of?
A
Microorganisms, so creates a preservative
