Question

check for understanding i - introduction
food fermentation
5 of 5
select all of the following statements about fermentation which are correct.

• fermentation has been used since ancient civilizations
• all canned goods are fermented
• fermentation causes spoilage
• fermentation uses microorganisms
• citric acid is made through fermentation

Explanation:

1. "Fermentation has been used since ancient civilizations" - Fermentation is an ancient technique used for food preservation, making drinks, etc., so this is correct.
2. "All canned goods are fermented" - Canned goods are preserved by canning (heating, sealing), not fermentation, so this is incorrect.
3. "Fermentation causes spoilage" - Controlled fermentation is used for food production; spoilage is unwanted microbial growth, not fermentation itself, so this is incorrect.
4. "Fermentation uses microorganisms" - Fermentation is a metabolic process of microorganisms (yeast, bacteria) to produce products like alcohol, acids, so this is correct.
5. "Citric acid is made through fermentation" - Citric acid is commercially produced by fermenting sugars with Aspergillus niger, so this is correct.

Answer:

• Fermentation has been used since ancient civilizations
• Fermentation uses microorganisms
• Citric acid is made through fermentation