This quiz works best with JavaScript enabled. Home > Class 8 > Class 8 Science Chapter 2 Microorganisms Friend And Foe ā Quiz 5 š Homepage š Download PDF Books š Premium PDF Books Class 8 Science Chapter 2 Microorganisms Friend And Foe Quiz 5 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the main function of microorganisms in the nitrogen cycle? A) Producing oxygen. B) Decomposing waste. C) Causing diseases. D) Fixing nitrogen. Show Answer Correct Answer: D) Fixing nitrogen. 2. What is the role of Rhizobium in agriculture? A) Causing diseases. B) Decomposing organic matter. C) Producing antibiotics. D) Fixing nitrogen. Show Answer Correct Answer: D) Fixing nitrogen. 3. Atmospheric nitrogen is used for the synthesis of ..... A) Plant protein. B) Animal protein. C) Plant carbohydrates. D) Alcohol. Show Answer Correct Answer: A) Plant protein. 4. Polio, chicken pox and AIDS are caused by different ..... A) Bacteria. B) Viruses. C) Fungi. D) Algae. Show Answer Correct Answer: B) Viruses. 5. Communicable diseases do not spread through ..... A) Air. B) Online interaction. C) Physical contact. D) Food. Show Answer Correct Answer: B) Online interaction. 6. Blue-green algae can fix atmospheric ..... in the soil A) Carbon. B) Nitrogen. C) Oxygen. D) All of the above. Show Answer Correct Answer: B) Nitrogen. 7. Citrus Canker is caused by which microorganism? A) Xanthomonas:Bacteria. B) Xanthomonas:Fungi. C) Bacilli Canker:Bacteria. D) Xanthomonas:Virus. Show Answer Correct Answer: A) Xanthomonas:Bacteria. 8. Which of the following is not a bacteria A) E.coli. B) Salmonella. C) Bacillus Anthracis. D) Bacteriophage. Show Answer Correct Answer: D) Bacteriophage. 9. ..... There are both attributes of both plants and plants ..... . Possess The Characteristics of Both Animals and Plants. A) Uglina Euglena. B) Paramaticium Paramecium. C) Spirauty spirgyra. D) Diantum Diatoms. Show Answer Correct Answer: D) Diantum Diatoms. 10. What is the main purpose of using preservatives in food? A) To change color. B) To increase nutrition. C) To prevent spoilage. D) To enhance flavor. Show Answer Correct Answer: C) To prevent spoilage. 11. Which of the following diseases is caused by a virus? A) Dysentery. B) Tuberculosis. C) Cholera. D) Chicken Pox. Show Answer Correct Answer: D) Chicken Pox. 12. Viruses can be seen through naked eye an can cause diseases like cholera and typhoid. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 13. Which of the following can be used to preserve food items? A) Common salt. B) Sodium benzoate. C) Sodium metabisulphite. D) All of these. Show Answer Correct Answer: D) All of these. 14. What is the primary way that pathogens enter the human body? A) Through exercise. B) Through the air. C) Through sunlight. D) Through water. Show Answer Correct Answer: B) Through the air. 15. These are dead or weakened microbes introduced to a healthy body where the body fights or kills the invading microbes by producing suitable antibodies is called A) Pathogens. B) Vaccination. C) Hepatitis. D) Tuberculosis. Show Answer Correct Answer: B) Vaccination. 16. Penicillium belongs to a group called A) Bacteria. B) Algae. C) Viruses. D) Fungi. Show Answer Correct Answer: D) Fungi. 17. What are microorganisms commonly referred to as? A) Microbes. B) Bacteria. C) Viruses. D) Fungi. Show Answer Correct Answer: A) Microbes. 18. The status of algae in the aquatic food chain is A) Consumers. B) Producers. C) Host. D) Small in size. Show Answer Correct Answer: C) Host. 19. Algae in latin means ..... A) Sea plants. B) Sea organisms. C) Sea weeds. D) None of the above. Show Answer Correct Answer: C) Sea weeds. 20. Polio drops given to children is actually an antibiotic. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 21. Casein coagulation takes place when milk is? A) Neutral. B) Basic. C) Acidic. D) None of the above. Show Answer Correct Answer: C) Acidic. 22. What is the primary benefit of using antibiotics? A) To enhance flavor. B) To kill disease-causing microorganisms. C) To increase soil fertility. D) To promote growth. Show Answer Correct Answer: B) To kill disease-causing microorganisms. 23. Most of the fungi are ..... while some are parasites. A) Saprophytes. B) Hectrophytes. C) Protistas. D) None of the above. Show Answer Correct Answer: A) Saprophytes. 24. Food Poisoning is caused due to the consumption of food spoilt by some microbes A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 25. Which of the following is NOT a major group of microorganisms? A) Bacteria. B) Fungi. C) Protozoa. D) Mammals. Show Answer Correct Answer: D) Mammals. ā PreviousNext āRelated QuizzesClass 8 Science Chapter 2 Microorganisms Friend And Foe Quiz 1Class 8 Science Chapter 2 Microorganisms Friend And Foe Quiz 2Class 8 Science Chapter 2 Microorganisms Friend And Foe Quiz 3Class 8 Science Chapter 2 Microorganisms Friend And Foe Quiz 4Class 8 Science Chapter 2 Microorganisms Friend And Foe Quiz 6Class 8 Science Chapter 2 Microorganisms Friend And Foe Quiz 7Class 8 Science Chapter 2 Microorganisms Friend And Foe Quiz 8Class 8 Civics Chapter 1 The Indian Constitution QuizClass 8 Civics Chapter 10 Law And Social Justice QuizClass 8 Civics Chapter 2 Understanding Secularism QuizClass 8 Civics Chapter 3 Why Do We Need A Parliament QuizClass 8 Civics Chapter 4 Understanding Laws QuizClass 8 Civics Chapter 5 The Judiciary QuizClass 8 Civics Chapter 6 Understanding Our Criminal Justice System QuizClass 8 Civics Chapter 7 Understanding Marginalisation QuizClass 8 Civics Chapter 8 Confronting Marginalisation QuizClass 8 Civics Chapter 9 Public Facilities QuizClass 8 English Chapter 1 The Best Christmas Present In The World QuizClass 8 English Chapter 10 Great Stone Face Ii QuizClass 8 English Chapter 2 The Tsunami QuizClass 8 English Chapter 3 Glimpses Of The Past QuizClass 8 English Chapter 4 Bepin Choudhury'S Lapse Of Memory QuizClass 8 English Chapter 5 The Summit Within QuizClass 8 English Chapter 6 This Is Jody'S Fawn QuizClass 8 English Chapter 7 A Visit To Cambridge QuizClass 8 English Chapter 8 A Short Monsoon Diary QuizClass 8 English Chapter 9 The Great Stone Face I QuizClass 8 English Chapter Poem 1 The Ant And The Cricket QuizClass 8 English Chapter Poem 2 Geography Lesson QuizClass 8 English Chapter Poem 3 Macavity The Mystery Cat QuizClass 8 English Chapter Poem 4 The Last Bargain QuizClass 8 English Chapter Poem 5 The School Boy QuizClass 8 English Chapter Poem 6 The Duck And The Kangaroo QuizClass 8 English Chapter Poem 7 When I Set Out For Lyonnesse QuizClass 8 English Chapter Poem 8 On The Grasshopper And Cricket QuizClass 8 English The Great Stone Face I QuizClass 8 Geography Chapter 1 Resources QuizClass 8 Geography Chapter 2 Land, Soil, Water, Natural Vegetation And Wildlife Resources QuizClass 8 Geography Chapter 3 Mineral And Power Resources QuizClass 8 Geography Chapter 4 Agriculture QuizClass 8 Geography Chapter 5 Industries QuizClass 8 Geography Chapter 6 Human Resources QuizClass 8 History Chapter 1 How, When And Where QuizClass 8 History Chapter 10 The Changing World Of Visual Arts QuizClass 8 History Chapter 11 The Making Of The National Movement 1870Sā1947 QuizClass 8 History Chapter 12 India After Independence QuizClass 8 History Chapter 2 From Trade To Territory QuizClass 8 History Chapter 3 Ruling The Countryside QuizClass 8 History Chapter 4 Tribals, Dikus And The Vision Of A Golden Age QuizClass 8 History Chapter 5 When People Rebel 1857 And After QuizClass 8 History Chapter 6 Colonialism And The City QuizClass 8 History Chapter 7 Weavers, Iron Smelters And Factory Owners QuizClass 8 History Chapter 8 Civilising The Native, Educating The Nation QuizClass 8 History Chapter 9 Women, Caste And Reform QuizClass 8 Maths Chapter 1 Rational Numbers QuizClass 8 Maths Chapter 10 Visualising Solid Shapes QuizClass 8 Maths Chapter 11 Mensuration QuizClass 8 Maths Chapter 12 Exponents And Powers QuizClass 8 Maths Chapter 13 Direct And Inverse Proportions QuizClass 8 Maths Chapter 14 Factorisation QuizClass 8 Maths Chapter 15 Introduction To Graphs QuizClass 8 Maths Chapter 16 Playing With Numbers QuizClass 8 Maths Chapter 2 Linear Equations In One Variable QuizClass 8 Maths Chapter 3 Understanding Quadrilaterals QuizClass 8 Maths Chapter 4 Practical Geometry QuizClass 8 Maths Chapter 5 Data Handling QuizClass 8 Maths Chapter 6 Squares And Square Roots QuizClass 8 Maths Chapter 7 Cubes And Cube Roots QuizClass 8 Maths Chapter 8 Comparing Quantities QuizClass 8 Maths Chapter 9 Algebraic Expressions And Identities QuizClass 8 Science Chapter 1 Crop Production And Management QuizClass 8 Science Chapter 10 Reaching The Age Of Adolescence QuizClass 8 Science Chapter 11 Force And Pressure QuizClass 8 Science Chapter 12 Friction QuizClass 8 Science Chapter 13 Sound QuizClass 8 Science Chapter 14 Chemical Effects Of Electric Current QuizClass 8 Science Chapter 15 Some Natural Phenomena QuizClass 8 Science Chapter 16 Light QuizClass 8 Science Chapter 17 Stars And The Solar System QuizClass 8 Science Chapter 18 Pollution Of Air And Water QuizClass 8 Science Chapter 3 Synthetic Fibres And Plastics QuizClass 8 Science Chapter 4 Materials Metals And Non Metals QuizClass 8 Science Chapter 5 Coal And Petroleum QuizClass 8 Science Chapter 6 Combustion And Flame QuizClass 8 Science Chapter 7 Conservation Of Plants And Animals QuizClass 8 Science Chapter 8 Cell Structure And Functions QuizClass 8 Science Chapter 9 Reproduction In Animals QuizClass 8 Civics Chapter 11 Parliament And The Making Of Laws QuizClass 8 English Supplementary Chapter 1 How The Camel Got His Hump QuizClass 8 English Supplementary Chapter 2 Children At Work QuizClass 8 English Supplementary Chapter 3 The Selfish Giant QuizClass 8 English Supplementary Chapter 4 The Treasure Within QuizClass 8 English Supplementary Chapter 5 Princess September QuizClass 8 English Supplementary Chapter 6 The Fight QuizClass 8 English Supplementary Chapter 7 Jalebis QuizClass 8 English Supplementary Chapter 8 Ancient Education System Of India Quiz š Back to Homepage š Download PDF Books š Premium PDF Books