2/5 Yeast

Self-test Questions (Yeast)

Question 1

What type of organism is yeast?

Yeast is the general name given to a large group of micro-organisms that are part of the fungi family. Yeast is a microscopic single-celled organism which contains no chlorophyll.

Question 2

Name the type of sugar that is directly fermentable by baker’s yeast?

The sugar that is directly fermentable by bakers yeast is sugar fungus. Or the scientific name is saccharimymyces cervisiae.

Question 3

Describe the two main functions of yeast in a bread dough

Yeast is one of the essential ingredients in bread production. The two main functions of yeast are to produce carbon dioxide gas (co2 gas) and to condition, or ripen, the gluten in the dough.

Question 4

What is the correct storage temperature for compressed yeast?

The correct storage temperatures for compressed yeast should be between 2 and 4 degrees Celsius.

Question 5

What term is used to describe how yeast absorbs soluble sugars?

Yeast is a one cell plant which multiplies by a process known as budding. Under the right conditions of water, sugars, warmth, and dissolved minerals, yeast causes fermentation. Yeast absorbs soluble sugars then by the process know as osmosis.


Question 6

List the different types of bakers yeast used in bakeries

Compressed Yeast
Dried Yeast
Cream Yeast

Question 7

What is the definition of fermentation?

Fermentation typically refers to the conversion of sugar to alcohol using yeast under anaerobic conditions. A more general definition of fermentation is the chemical conversion of carbohydrates into alcohols or acids. Fermentation is the breakdown of complex sugars into simple sugars, then finally into co2 and alcohol by enzymes which are found in yeast cells and flours.

Question 8

List the basic requirements for yeast growth.

Water
Moisture
Sugars
Warmth
Dissolved Minerals
Food