Microorganisms friends and foe Worksheet-16

Microorganisms friends and foe Worksheet-16


True or False:

  1. The living organisms which cannot be seen with naked eyes are called microorganisms.

  2. Typhoid is caused by bacteria.

  3. Tuberculxin is the toxin released by bacteria causing tuberculosis.

  4. Tuberculosis is a viral disease.

  5. Hepatitis A is a viral disease.

  6. Cholera is transmitted through food and water.

  7. Male anopheles mosquito is the carrier of malarial parasite.

  8. Plasmodium is the malarial parasite.

  9. Malaria is caused by a protozoan.

  10. Alcohol is produced by yeast.

  11. The process of conversion of sugar to alcohol is pasteurization.

  12. Edward Jenner discovered small pox vaccine.

  13. Robert Koch discovered penicillin.

  14. Disease causing microorganisms are called pathogens.

  15. Amoeba is a type of bacteria.

  16. Bubbles of oxygen gas fill the dough after fermentation and increase its volume.

  17. Yellow vein mosaic of bhindi is a viral disorder of plants.

  18. Rhizopus resides in the root nodules of leguminous plants.

  19. Spirogyra and Chlamydomonas are types of protozoans.

  20. Lactobacillus promotes the formation of curd.

  21. Dead or weakened microbes are called antibiotics.

  22. When a disease producing microbe enters our body, the body produces antigen.

  23. Chemicals used to check the growth of microorganism in food are called preservatives.

  24. Salting is the method of preservation used to preserve milk.

  25. Sugar reduces the moisture content which inhibits the growth of bacteria in food.

  26. Nitrogen is used by the plants for the synthesis of carbohydrates.

  27. Microorganisms growing on our food substances produce toxin which leads to food poisoning.

  28. Citrus canker is animal bacterial disorder.



  1. True

  2. True

  3. False

  4. False

  5. True

  6. True

  7. True

  8. True

  9. True

  10. True

  11. False

  12. True

  13. False

  14. True

  15. False

  16. False

  17. True

  18. False

  19. False

  20. True

  21. False

  22. False

  23. True

  24. False

  25. True

  26. False

  27. True

  28. False