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Questions and Answers
Which of the following microbes are commonly referred to as lactic acid bacteria (LAB)?
Which of the following microbes are commonly referred to as lactic acid bacteria (LAB)?
- Saccharomyces cerevisiae
- Lactobacillus (correct)
- Staphylococcus
- Escherichia coli
What is produced as a result of the fermentation of milk by LAB?
What is produced as a result of the fermentation of milk by LAB?
curd
What beneficial role do LAB play in our stomachs?
What beneficial role do LAB play in our stomachs?
They check disease-causing microbes.
The dough used for making dosa and idli is fermented by bacteria, resulting in the production of ______ gas.
The dough used for making dosa and idli is fermented by bacteria, resulting in the production of ______ gas.
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What type of yeast is used for fermenting bread dough?
What type of yeast is used for fermenting bread dough?
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All microbes are harmful to humans.
All microbes are harmful to humans.
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Name a traditional drink made by fermenting sap in southern India.
Name a traditional drink made by fermenting sap in southern India.
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Study Notes
Microbes in Human Welfare
- Microbes are essential components of biological systems on Earth.
- They are found everywhere, including soil, water, air, and inside living organisms.
- Microbes are diverse, including bacteria, fungi, protozoa, viruses, viroids, and prions.
- Microbes are grown on nutrient media to form colonies, which are visible to the naked eye.
- Microbes are useful in many ways and contribute to different aspects of human life.
- For example, microbes play a role in the production of household products like curd and fermented foods.
- Lactic acid bacteria (LAB) are responsible for converting milk into curd, contributing to its nutritional quality.
- Yeast (Saccharomyces cerevisiae) plays a crucial role in the fermentation of bread dough.
- Fermented products like dosa, idli, and toddy are produced using specific microbes.
- The production of carbon dioxide (CO2) during fermentation is a result of microbial metabolic activity.
- Microbes inhabit even extreme environments like thermal vents, deep in the soil, and under layers of snow.
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