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प्रश्न
Which type of food would have lactic acid bacteria? Discuss their useful application.
उत्तर
The most common food item is curd, and yoghurt contains Lactic Acid Bacteria (LAB) of Lactobacillus species. Curd is formed by adding a small amount of curd to the milk, which acts as a starter. Microbes present in the starter multiply at suitable temperatures and convert milk into curd. Acids released by LAB during the growth coagulate and partially digest milk protein, casein thus increases the digestibility of milk protein.
Application of LAB
- Improves the nutritional quality of milk by increasing vitamin B12.
- Checks disease-causing microbes in the stomach.
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संबंधित प्रश्न
Bacteria cannot be seen with the naked eyes, but these can be seen with the help of a microscope. If you have to carry a sample from your home to your biology laboratory to demonstrate the presence of microbes with the help of a microscope, which sample would you carry and why?
Give examples to prove that microbes release gases during metabolism.
Answer the following question:
Name the group of bacteria involved in setting milk into curd. Explain the process they carry in doing so. Write another beneficial role of such bacteria.
Which of the following microorganism is used for production of citric acid in industries?
List the advantages of biogas plants in rural areas.
Which of the following used in Swiss cheese?
The vitamin whose content increases following the conversion of milk into curd by lactic acid bacteria is ______.
What is the source organism for ECORI, restriction endonuclease?
Which species of Penicillium produces Roquefort cheese?
Read the passage given below carefully and answer the questions that follow:
|
The bacterium Bacillus thuringiensis serovar israelensis (Bti) is commercially prepared in various formulations such as liquid, water dispersible granules, powders, and pellets. It is used as a larvicide all over the world due to its ability to produce a toxic protein that primarily targets the larvae of mosquitoes. In Sweden, Bti has been applied on a large scale in the form of commercially available granular formulation Vecto Bac G (Valent BioScience, USA). The applications have taken place in the lower Dalalven River Area to control mass outbreaks of the floodplain mosquito Aedes sticticus. |
- Why does the toxic protein kill the insects but not the bacterium?
- Can the formulation Vecto Bac G be used to eliminate the species of mosquito referred to above? Why?
