CBSE Class 12 Biology Microbes in Human Welfare Quiz 2

1. Streptomycin is produced by:

A By Streptomyces Scoleus B By Streptomyces fradiae C By Streptomyces venezueleae D By Streptomyces griseus

2. Antibiotics are:

A Medicines B Toxin C Plants D Syrups

3. A free-living aerobic and non-photosynthetic nitrogen fixing bacterium is:

A Anabaena B Clostridium C Azotobactor D Rhizobium

4. For retting of jute, the fermenting microbe is:

A Methanophilic bacteria B Butyric acid bacteria C Helicobactor pylon D Streptococcus lactin