| 8th Micro- organism :Multiple choice Questions |
| 1. The microbe that reproduce only inside the body of the host organism |
| a) Bacteria b) Virus c) Protozoa d) Fungi |
| 2. Disease like Dysentery and Malaria are caused by: |
| a) Fungi b) Bacteria c) Protozoa d) Virus |
| 3. Micro organism use in the baking industry for making breads |
| a) Algae b) Fungi c) Yeast d) Moulds |
| 4. Edward Jenner in 1798 discovered the vaccine for ______________ |
| a) Chicken pox b) Polio c) Small pox d) Rabies |
| 5. Disease causing micro organisms are called________________ |
| a) Carriers b) Pathogens c) Antibodies d) Microbes |
| 6. Dengue fever is spread by |
| a) House fly b) Female Anopheles mosquito c) Female Aedes mosquito d) Bees |
| 7. Hepatitis B is spread by: |
| a) Bacteria b) Virus c) Protozoa d) Fungi |
| 8. Anthrax is caused by____________ |
| a) Fungi b) Bacteria c) Protozoa d) Virus |
| 9. Robert Koch in 1876 discovered the microbe causing _____________ disease |
| a) Foot and mouth disease b) Rust of wheat c) Citrus Canker d) Anthrax |
| 10. Yellow vein mosaic of bhindi is a disease caused in plants by___________ |
| a) Bacteria b) Virus c) Protozoa d) Fungi |
| 11. Sodium Benzoate is a _______________ |
| a) Vaccine b) Preservative c) Antibiotic d) Pesticide |
| 12. Jellies are preserved by________________ |
| a) Salt b) Vinegar c) Sugar d) Air tight packets |
| 13. Raw mangoes are preserved by___________. |
| a) Sugar b) Salt c) oil d) Cold treatment |
| 14. Rhizobium is a kind of ______________. |
| a) Virus b) Bacteria c) Fungi d) Protozoa |
| 15. Fixing nitrogen in the soil is done by______________. |
| a) Protozoa b) Bacteria c) Fungi d) Virus |
| 16. Setting of curd is promoted by____________. |
| a) Yeast b) Virus c) Lacto bacillus d) Rhizobium |
| 17. AIDS is caused by_________________. |
| a) Bacteria b) Virus c) Yeast d) Algae |
| 18. Yeast is used in the production of ________________. |
| a) Sugar b) Alcohol c) Hydrochloric acid d) Oxygen |
| 19. The following is an antibiotic. |
| a) Sodium bi carbonate b) Streptomycin c) Alcohol d) Yeast |
| 20. The most common carrier of communicable disease is_______________. |
| a) Spider b) Dragon fly c) House fly d) Ant |
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| Question No. | Answer | Question No. | Answer |
| 1 | b | 11 | b |
| 2 | c | 12 | c |
| 3 | c | 13 | b |
| 4 | c | 14 | b |
| 5 | b | 15 | b |
| 6 | c | 16 | c |
| 7 | b | 17 | b |
| 8 | b | 18 | b |
| 9 | d | 19 | b |
| 10 | b | 20 | c |
| 1. The curd contains -----a bacterium which helps to change the milk into curd |
| Lacto bacillus |
| 2. -------------is used for commercial production of alcohol and wine. |
| Yeast |
| 3. Process of conservation of sugar into alcohol is known as ---------------- |
| Fermentation. |
| 4. Disease causing microorganisms are called ------------------------- |
| Pathogens |
| 5. Virus is a Latin word which means ----------------- |
| 6. Virus is a Latin word which means------------------. |
| Poison |
| 7. ------------ are on the border line between living and non-living organisms |
| Virus |
| 8. The study of bacteria is called ------------------------ |
| Bacteriology. |
| 9. Virus was discovered by ------------ in 1892 |
| Ivanowsky |
| 10. ------------ Viruses show both living and non-living characteristics |
| Virus |
| 11. The study of bacteria is called ----------- |
| Bacteriology |
| 12. Bacteria were first observed under a microscope by ------------------ |
| Anton Von Leeuwenhoek |
| 13. The study of algae is called ------------------- |
| Phycology |
| 14. Cocci is ----------shaped) where as Bacilli is --------------shaped bacteria. |
| Spherical, Rod |
| 15. -------------------is a unicellular green algae |
| Chlamydomonas |
| 16. The study of fungi is called -------------- |
| Mycology. |
| 17. Fungi do not possess ---------and led a lead a parasitic or saprophytic mode of life. |
| Chlorophyll |
| 18. A black powdery spot with a network of thread like filaments in fungi , called ----- |
| Hyphae |
| 19. Azatobactor, Clostridium, Rhizobium are ---- fixing bacteria. |
| Nitrogen |
| 20. Oscillatoria, Anabaena and Nostoc are - which increase the soil fertility by fixing atmospheric nitrogen. |
| Blue green algae |
| 21. Vinegar is manufactured from sugar solution using ----------- |
| Acetobacter aceti. |
| 22. Some algae produce dense masses of materials that cover the water surface, thereby decrease the oxygen content of water is called ………….. |
| Algal bloom |
| 23. -----------------is a science which deals with diseases of plants, animals and human beings caused by viruses, bacteria and fungi. |
| Pathology |
| 24. Algal bloom leads to loss of species diversity which is known as ------- |
| Eutrophication |
| 25. Milk is heated to 72oC for 30 minutes and then suddenly cooled to 12oC.is called ----- |
| Pasteurization |
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| Ø 8th Micro- organism :Multiple choice Questions |