Tamil Nadu State Board ( Samacheer Kalvi ) Online Test based on Book Back Questions - 12th Standard Biology - English Medium - Microbes in Human Welfare

Samacheer Kalvi 12th Biology - Microbes in Human Welfare - Book Back Questions in English Medium


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Question 1 Of 10

Which of the following is not involved in nitrogen fixation?


Question 2 Of 10

Assertion (A): Streptomycin is an antibiotic.
Reason (R): Antibiotic are microbial chemicals inhibits the growth of pathogenic microbe.


Question 3 Of 10

The leavering of the dough during fermentation is due to


Question 4 Of 10

Oil strains in laundry can be removed using ……………….


Question 5 Of 10

Which of the following plant species is the most suitable oilseed for biodirect production?


Question 6 Of 10

The most common substrate used in distilleries for the production of ethanol is


Question 7 Of 10

Cry toxins obtained from Bacillus thuringiensis are effective against for ………….


Question 8 Of 10

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


Question 9 Of 10

The flavour in the yogurt is due to ………………..


Question 10 Of 10

Name the person who was the first to use the term antibiotic.


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