Flashcard03 Food Microbiology

Front

What are the two main types of fungi involved in food microbiology?

Back

Yeast and mold.

Front

True or False: Both yeast and mold are fungi.

Back

True.

Front

What are endospores and which bacteria are known to produce them?

Back

Endospores are a dormant, tough, and non-reproductive structure produced by certain bacteria, such as Bacillus and Clostridium.

Front

True or False: The arrows in a diagram always indicate endospores of Bacillus sp.

Back

False.

Front

What is a thioglycolate medium used for in microbiology?

Back

Thioglycolate medium is used to determine the oxygen requirements of microorganisms.

Front

In a thioglycolate medium, where do microaerophiles typically grow?

Back

Microaerophiles grow in areas with low oxygen concentration, often near the middle of the medium.

Front

Which microorganism is responsible for the fermentation of soy sauce?

Back

Aspergillus sojae.

Front

What is the role of Aspergillus niger in food microbiology?

Back

Aspergillus niger is used in the production of citric acid and other fermentation processes.

Front

What is the minimal water activity (Aw) required for the growth of Staphylococcus aureus?

Back

0.86.

Front

Define water activity (Aw) in the context of food microbiology.

Back

Water activity (Aw) is a measure of the availability of water for microbial growth, ranging from 0 (completely dry) to 1 (pure water).