Card Set Information
Standard Grade Biology - Biotechnology
What is yeast?
A single celled organism - fungi
What is fermentation?
When yeast respire anaerobically to produce carbon dioxide and alcohol
What gas is released from respiring yeast that makes bread rise?
Batch processing takes place in a _______ and allow ______ scale fermentation to take place?
What is malting?
When barley seeds are allowed to germinate to breakdwon starch into maltose
How is yoghurt produced?
By the fermentation of milk
What does the fermentation of milk produce?
Lactic acid (which turns the milk acidic and makes it turn sour)
What is the word equation for the fermentation of milk?
lactose -----> lctic acid
In cheese making, what enzyme is added to seperate the milk into curds and whey?
What is the solid and liquid part of cheese?
Solid - curds
Liquid - Whey
In cheese making, why is salt added to the curd?
T prevent the growth of bacteria
Name three diseases that can be foun in untreated sewage
What is a saprophyte?
An oranism that obtains its food from dead or decaying organisms
What is tehe name of the technique used to ensure that experiments are not contaminated?
Aseptic or sterile technique
Both the nitrogen and carbon cycles rely on the activity of....?
What kind of fuels can microbes produce?
In sewage treatment plants thery use
_______ and _________ bacteria?
aerobic and anaerobic
What is mycroprotein?
A source of protein suitable for vegetarians made from a fungus
Why is there an increasing demand for insulin?
As life expectancy continues to increase the demand for insulin will continue to rise
Name three products that can be made through genetic engineering?
Human Growth Hormone
Oil digesting enzymes
What do antibiotics do?
They kill bacteria
Continous flow processing uses ______ enzymes placed in a fermenter?
Continous flow _____ profitability and ____ costs?