Q6 of 32 Page 203

Differentiate between

a. Benign and malignant tumours


b. Viral oncogenes and protooncogenes


a.



b. Proto-oncogenes. These are normal genes that on activation due to mutation may change into oncogenes.


Viral-oncogenes, these are the cancer causing genes present inside the virus.


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With the help of a suitable example mention the role of microbes in:

a. Single cell protein


b. Organic farming


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Name the microbe used for production of Swiss cheese.

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