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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Why does ‘Swiss cheese’ have big holes?

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प्रश्न

Why does ‘Swiss cheese’ have big holes?

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उत्तर

The large holes in ‘Swiss cheese’ are due to the production of a large amount of CO2 by a bacterium named Propionibacterium sharmanii.

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  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 10: Microbes in Human Welfare - VERY SHORT ANSWER [पृष्ठ ७२]

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एनसीईआरटी एक्झांप्लर Biology Exemplar [English] Class 12
पाठ 10 Microbes in Human Welfare
VERY SHORT ANSWER | Q 1. | पृष्ठ ७२

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

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.


Give the biological name of the following: 

The microbe used to produce Swiss cheese.


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.


Answer the following question:
Why does 'Swiss Cheese' develop large holes?


Name the microbes that help the production of the following product commercially:
Citric acid


How is milk converted into curd? Explain the process of curd formation.


Write short notes on the following:

Brewer's yeast


List the advantages of biogas plants in rural areas.


Which of the following pair is correctly matched for the product produced by them?


Concentrations of which vitamin increases, while the milk is converted into curd by the process of fermentation:


Which of the following used in Swiss cheese?


What is the source organism for ECORI, restriction endonuclease?


Which species of Penicillium produces Roquefort cheese?


Which type of food would have lactic acid bacteria? Discuss their useful application.


Home-made fruit juices are turbid, while the bottled ,fruit juices purchased from the market are clear. Give a reason for this difference.


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.

  1. Why does the toxic protein kill the insects but not the bacterium?
  2. Can the formulation Vecto Bac G be used to eliminate the species of mosquito referred to above? Why?

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