1. Microorganisms

2. What is the connection?

3. Yeast!
Budding yeast cells
The shmoo

4. Yeast is a single celled organism

5. Yeast is used to make beer
Yeast can carry out anaerobic respiration.
This produces:
carbon dioxide and ethanol
This process is called:
fermentation

6. How to make beer Barley seeds are moistened so that they germinate.
Amylase in the seed breaks down starch to maltose (malting)
This maltose is extracted, and yeast uses it as an energy source to respire.
Carbon dioxide and ethanol are produced.
Hops are added to give the beer flavour.

7. Hops
How beer is made