Lab: Microbio of alcohol fermentation and yogurt production

Question 1

Fermentation is used to

Answer 1

means of food preservation because acids and anaerobic conditions reduce the growth of other microbes responsible for spoilage

Question 2

What is fermentation?

Answer 2

anaerobic process where bacteria or yeasts oxidize a substance without an external electron acceptor.
Energy yielding reaction that returns NADH to NAD+.
alcohol production = ethanol +CO2
yogurt production = lactic acid

Question 3

Alcohol fermentation needs what conditions?

Answer 3

1. simple sugars
2. anaerobic conditions
3. yeast

Question 4

What yeast is used to make wine?

Answer 4

Saccharomyces cerevisiae

Question 5

Yogurt fermentation process

Answer 5

uses lactobacilli to curdle and thicken milk.