Multiple Choice Quiz on Microbes in Human Welfare

This quiz is designed to assess your basic knowledge in ‘Microbes in Human Welfare’. Questions come under ‘medium’ category. Choose the best answer from the four options given. When you've finished answering as many of the questions as you can, scroll down to the bottom of the page and check your answers by clicking 'Get score'. Percentage score will be displayed along with right answers.

1. What is true about Bt toxin?
Bt protein exists as active toxin in the Bacillus
the concerned Bacillus has antitoxins
the activated toxin enters the ovaries of the pest to sterilise it and thus prevents its multipliccation
the inactive protoxin gets converted into active form in the insect gut

2. Which one of the following pairs is wrongly matched?
textile - amylase
alcohol - nitrogenase
detergents - lipase
fruit juice - pectinase

3. Which of the following is not is wrongly matched?
Trichoderma harzianum
Bacillus thuringiesis
NPV (Nuclear Polyhedrosis Virus)
Xanthomonas campestris

4. Azolla is used as a biofertilizer because, it
multiples very fast to produce massive biomass
has association of nitrogen fixing Rhizobium
has association of mycorrhiza
has association of nitrogen fixing cyanobacteria

5. Chloromycetin is obtained from
Bacillus subtilis
Clostridium botulinum
Streptomyces rimosus
Streptomyces venezuelae

6. The nitrifying bacteria that convert the ammonia to nitrate is
Azotobacter
Nitosomonas and Nitrobacter
Rhizobium
Thiobacillus dentrificans

7. The rotenone is
a natural herbicide
an insect hormone
a bioherbicide
a natural insecticide

8. The organism used for alcoholic fermentation is
Aspergillus
Saccharomyces
Pencillium
Pseudomonas

9. First vitamin to be produced through fermentation process using a wild bacterium was
Vitamin D
Vitamin C
Vitamin B2
Vitamin B12

10. The bacterium Bacillus thuringiensis (Bt) is widely used in contemporary biology as
insecticide
indicator of water pollution
source of industrial enzyme
agent for production of dairy products
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