Zoology - Microbes in Human Welfare Three Marks Questions

12th Standard EM

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Biology

Time : 01:00:00 Hrs
Total Marks : 30
    10 x 3 = 30
  1. Explain the role of cry-genes in genetically modified crops.

  2. Write the key features of organic farming.

  3. Justify the role of microbes as a bio-fertilizer

  4. What is 'activated sludge' in sewage treatment?

  5. UV is an ideal disinfectant for waste water. Give Reason

  6. What is biogasr?

  7. How does Delta-endotoxin affect insects?

  8. Differentiate between Prebiotics and Probiotics

  9. Name the scientists who were awarded Nobel Prize in.1945 for discovering the penicillin drug & its role as an antibiotic.

  10. Write a short note on biodiesel

*****************************************

TN 12th Standard EM Biology free Online practice tests

Reviews & Comments about 12th Zoology - Microbes in Human Welfare Three Marks Questions

Write your Comment