Edexcel Biology B3 topic 1 - Biotechnology

Biology B3 biotechnology (EDEXCEL) revision
Important processes
Production of Yoghurt

1. Milk is pasteurised to kill any pathogens and cooled to 450C
2. A culture of Lactobacillus Bulgaricus is added to the warm milk
3. The bacteria break down the lactose sugar in the milk into lactic acid
4. The…

Microorganism Use
Acetobacter Used in the production of Vitamin C
Saccharomyces Ceravisiae ­ a type of yeast Produces the enzyme invertase which converts
sucrose into glucose and fructose to produce
the semi-liquid centre in some chocolate eggs
Aspergillus Niger To Produce Citric acid which is used as a
flavouring and…

o Plant Stanol Esters can lower cholesterol. High levels of cholesterol can lead to heart
problems
o Prebiotics are foods containing Oligosaccharides. They are not easily digested by the
human gut and provide food for `friendly bacteria'




Stem cells and biotechnology ethics
Stem cells

Stem cells are undifferentiated cells with…