Micro-organisms

Question 1

what’s the equation which takes place in yeast cells

Answer 1

Glucose –> Carbon Dioxide + Ethanol

Question 2

what is fermentation

Answer 2

fermentation is when micro-organisms break sugars down to release energy by anaerobic respiration

Question 3

what causes the bread to rise

Answer 3

the carbon dioxide produced by fermentation causes the bread to rise

Question 4

what produces lactic acid

Answer 4

bacteria called Lactobacillus respire a sugar called lactose in milk to produce lactic acid

Question 5

what does the lactic acid do

Answer 5

the lactic acid turns the milk into yoghurt giving it a thicker texture and sour taste

Question 6

what are the factors effecting micro-organism growth

Answer 6

1) Moisture Availability

2) Temperature

Question 7

in regard to microorganisms cultured in industrial fermentation. What must the conditions in the fermenters be for the right microorganisms to grow and respire

Answer 7

1) Plenty of nutrients available
2) Optimum temperature
3) Oxygenated
4) Aseptic Conditions - Dangerous Micro could grow
5) Optimum pH