MCQ on Class 8 Microorganisms Friends and Foe

1. Microorganisms have a hard outer covering called ………

2. The study of microorganisms is known as ………

3. Edward Jenner discovered the vaccine for ………….. in 1798.

4. Scientists who study microorganisms are known as ………

5. The plant disease called ‘citrus canker’ is caused by …….

6. Who discovered the bacteria Bacillus anthracis which causes anthrax disease in animals in 1876 ?

7. The plant disease called ‘yellow vein mosaic of OKRA (bhindi)’ is caused by a ………

8. The spoiling of food is a ………..change

9. The insect which transmits disease-causing micro-organisms to humans is called a ………..

10. The antibiotic ‘penicillin’ was discovered  ‘Penicillium’ which is a ………….

11. Spherical-shaped bacteria are called ……..

12. Dengue is caused by a……………

13. The plant disease called ‘rust of wheat’ is caused by …….

14. Rod-shaped bacteria is called ………..

15. Malaria is caused by ………….

16. Micro-organisms that cause diseases are called………………

17. Spiral-shaped bacteria is called ………

18. Bacteria and fungi are used to make medicines called……….