{"id":35662,"date":"2024-06-28T14:44:08","date_gmt":"2024-06-28T09:14:08","guid":{"rendered":"https:\/\/wbbsesolutions.net\/?p=35662"},"modified":"2024-07-04T14:46:42","modified_gmt":"2024-07-04T09:16:42","slug":"wbbse-class-9-life-science-chapter-4-microbes-in-human-welfare-mcqs","status":"publish","type":"post","link":"https:\/\/wbbsesolutions.net\/wbbse-class-9-life-science-chapter-4-microbes-in-human-welfare-mcqs\/","title":{"rendered":"WBBSE Class 9 Life Science Chapter 4 Microbes In Human Welfare Multiple Choice Questions"},"content":{"rendered":"

WBBSE Class 9 Life Science Chapter 4 Biology And Human Welfare Microbes In Human Welfare Multiple Choice Questions<\/h2>\n

Question 1. Microbes are\u2014<\/p>\n

    \n
  1. Virus<\/li>\n
  2. Bacteria<\/li>\n
  3. Protozoa<\/li>\n
  4. All of these<\/li>\n<\/ol>\n

    Answer: 4. All of these<\/p>\n

    Question 2. The term \u2018microbe\u2019 was coined by\u2014<\/p>\n

      \n
    1. Robert Hook<\/li>\n
    2. Sedillot<\/li>\n
    3. Robert Brown<\/li>\n
    4. Leeuwenhoek<\/li>\n<\/ol>\n

      Answer: 2. Sedillot<\/p>\n

      Question 3. Azolla maintains a symbiotic association with<\/p>\n

        \n
      1. Azotobacter<\/li>\n
      2. Clostridium<\/li>\n
      3. Nostoc<\/li>\n
      4. Anabaena<\/li>\n<\/ol>\n

        Answer: 4. Anabaena<\/p>\n

        Read and Learn More WBBSE Class 9 Life Science MCQs<\/a><\/strong><\/p>\n

        Question 4. Which is not a bio-fertilizer?<\/p>\n

          \n
        1. Rhizobium<\/li>\n
        2. Azolla<\/li>\n
        3. Agaricus<\/li>\n
        4. Azotobacter<\/li>\n<\/ol>\n

          Answer: 3. Agaricus<\/p>\n

          Question 5. Some cyanobacteria are used as bio-fertilizer because\u2014<\/p>\n

            \n
          1. They are capable of trapping free O2<\/sub> more than other plants<\/li>\n
          2. They can solubilize phosphorus<\/li>\n
          3. They can trap atmospheric nitrogen<\/li>\n
          4. They help the soil to retain more water<\/li>\n<\/ol>\n

            Answer: 3. They can trap atmospheric nitrogen<\/p>\n

            WBBSE Class 9 Life Science Question And Answer<\/strong><\/p>\n

            Question 6. Bf for Bt-cotton stands for\u2014<\/p>\n

              \n
            1. Biologically transformed<\/li>\n
            2. Biotechnology<\/li>\n
            3. Bacillus thuringiensis<\/li>\n
            4. None of these<\/li>\n<\/ol>\n

              Answer: 3. Bacillus thuringiensis<\/p>\n

              Question 7. Mycorrhiza is an\u2014<\/p>\n

                \n
              1. Association of fungi and algae<\/li>\n
              2. Association of fungi and flowering plants<\/li>\n
              3. Association of fungi and bacteria<\/li>\n
              4. Association of algae and vascular plants<\/li>\n<\/ol>\n

                Answer: 2. Association of fungi and flowering plants<\/p>\n

                \"WBBSE<\/p>\n

                Question 8. Cyanobacteria are\u2014<\/p>\n

                  \n
                1. Chemosynthetic bacteria<\/li>\n
                2. Photosynthetic prokaryotic microorganisms<\/li>\n
                3. Non-photosynthetic nitrogen-fixing prokaryotic microorganisms<\/li>\n
                4. Nitrogen-fixing protozoa<\/li>\n<\/ol>\n

                  Answer: 2. Photosynthetic prokaryotic microorganisms<\/p>\n

                  Question 9. A soil-dwelling nitrogen-fixing bacterium is\u2014<\/p>\n

                    \n
                  1. Anabaena<\/li>\n
                  2. Salmonella<\/li>\n
                  3. Clostridium<\/li>\n
                  4. Lactobacillus<\/li>\n<\/ol>\n

                    Answer: 3. Clostridium<\/p>\n

                    Question 10. Which of the following microorganisms can kill insect pests?<\/p>\n

                      \n
                    1. Bacillus thuringiensis<\/li>\n
                    2. Leptomonas<\/li>\n
                    3. Nosema locustae<\/li>\n
                    4. All of these<\/li>\n<\/ol>\n

                      Answer: 4. All of these<\/p>\n

                      WBBSE Class 9 Life Science Question And Answer<\/strong><\/p>\n

                      Question 11. The virus used in the bio-control of insect pests is\u2014<\/p>\n

                        \n
                      1. Phage virus<\/li>\n
                      2. Rubella virus<\/li>\n
                      3. Nuclear Polyhedrosis Virus<\/li>\n
                      4. Lipovirus<\/li>\n<\/ol>\n

                        Answer: 3. Nuclear Polyhedrosis Virus<\/p>\n

                        Question 12. An anaerobic nitrogen-fixing non-symbiotic bacterium\u2014<\/p>\n

                          \n
                        1. Azotobacter<\/li>\n
                        2. Clostridium<\/li>\n
                        3. Rhizobium<\/li>\n
                        4. Azospirillum<\/li>\n<\/ol>\n

                          Answer: 2. Clostridium<\/p>\n

                          Question 13. VAM is a\/an\u2014<\/p>\n

                            \n
                          1. Ectomycorrhiza<\/li>\n
                          2. Ectendomycorrhiza<\/li>\n
                          3. Endomycorrhiza<\/li>\n
                          4. Cyanobacterium<\/li>\n<\/ol>\n

                            Answer: 3. Endomycorrhiza<\/p>\n

                            Question 14. Granulosis virus and NPV are similar as both act as\u2014<\/p>\n

                              \n
                            1. Antibacterial substance<\/li>\n
                            2. Bio-control agents<\/li>\n
                            3. Biofertilizers<\/li>\n
                            4. Disease-causing agent for human<\/li>\n<\/ol>\n

                              Answer: 2. Bio-control agents<\/p>\n

                              Question 15. Bacteria used for controlling Japanese beetle\u2014<\/p>\n

                                \n
                              1. Bacillus thuringiensis<\/li>\n
                              2. Bacillus popular<\/li>\n
                              3. Bacillus subtilis<\/li>\n
                              4. Rhizobium fasciola<\/li>\n<\/ol>\n

                                Answer: 2. Bacillus popular<\/p>\n

                                Question 16. Spodopterin, a bio-control agent for insect pests is composed of\u2014<\/p>\n

                                  \n
                                1. Virus<\/li>\n
                                2. Bacteria<\/li>\n
                                3. Protozoa<\/li>\n
                                4. Fungus<\/li>\n<\/ol>\n

                                  Answer: 4. Fungus<\/p>\n

                                  Question 17. An example of cyanobacteria is\u2014<\/p>\n

                                    \n
                                  1. Anabaena<\/li>\n
                                  2. Gleocapsa<\/li>\n
                                  3. Oscillatoria<\/li>\n
                                  4. All of these<\/li>\n<\/ol>\n

                                    Answer: 4. All of these<\/p>\n

                                    WBBSE Class 9 Life Science Question And Answer<\/strong><\/p>\n

                                    Question 18. Mycorrhizae fungi association with\u2014<\/p>\n

                                      \n
                                    1. The root system of pine<\/li>\n
                                    2. Leaf of fern<\/li>\n
                                    3. Green algae<\/li>\n
                                    4. None of these<\/li>\n<\/ol>\n

                                      Answer: 1. The root system of pine<\/p>\n

                                      Question 19. Application of Azolla in paddy fields is popularly practiced in\u2014<\/p>\n

                                        \n
                                      1. European countries<\/li>\n
                                      2. South American states<\/li>\n
                                      3. Southeast Asian countries<\/li>\n
                                      4. All of these<\/li>\n<\/ol>\n

                                        Answer: 3. Southeast Asian countries<\/p>\n

                                        Question 20. Mycorrhiza is used as a bio-fertilizer because it\u2014<\/p>\n

                                          \n
                                        1. Can remove harmful heavy metals from the soil<\/li>\n
                                        2. Can absorb water<\/li>\n
                                        3. Can help in mineral absorption<\/li>\n
                                        4. All of these<\/li>\n<\/ol>\n

                                          Answer: 4. All of these<\/p>\n

                                          Question 21. An antibiotic-producing fungus is\u2014<\/p>\n

                                            \n
                                          1. Aspergillus<\/li>\n
                                          2. Agaricus<\/li>\n
                                          3. Penicillium<\/li>\n
                                          4. Saccharomyces<\/li>\n<\/ol>\n

                                            Answer: 3. Penicillium<\/p>\n

                                            WB Class 9 Life Science Question Answer<\/strong><\/p>\n

                                            Question 22. Nitrifying bacteria are\u2014<\/p>\n

                                              \n
                                            1. Parasitic bacteria<\/li>\n
                                            2. Chemosynthetic bacteria<\/li>\n
                                            3. Autotrophic bacteria<\/li>\n
                                            4. None of these<\/li>\n<\/ol>\n

                                              Answer: 2. Chemosynthetic bacteria<\/p>\n

                                              Question 23. Bacteria that are capable of trapping atmospheric nitrogen are\u2014<\/p>\n

                                                \n
                                              1. Putrefying bacteria<\/li>\n
                                              2. Nitrogen-fixing bacteria<\/li>\n
                                              3. Denitrifying bacteria<\/li>\n
                                              4. Nitrifying bacteria<\/li>\n<\/ol>\n

                                                Answer: 2. Nitrogen-fixing bacteria<\/p>\n

                                                Question 24. The bacterium, mostly used in the experiments of biotechnology is\u2014<\/p>\n

                                                  \n
                                                1. Rhizobium<\/li>\n
                                                2. Streptomyces<\/li>\n
                                                3. Salmonella<\/li>\n
                                                4. E.coli<\/li>\n<\/ol>\n

                                                  Answer: 4. E.coli<\/p>\n

                                                  Question 25. Rhizobium is a\u2014<\/p>\n

                                                    \n
                                                  1. Free-living, nitrogen-fixing bacteria<\/li>\n
                                                  2. Symbiotic, nitrogen-fixing bacteria<\/li>\n
                                                  3. Cyanobacteria<\/li>\n
                                                  4. Denitrifying bacteria<\/li>\n<\/ol>\n

                                                    Answer: 2. Symbiotic, nitrogen-fixing bacteria<\/p>\n

                                                    WBBSE Class 9 Life Science Question And Answer<\/strong><\/p>\n

                                                    Question 26. Application of Azolla in paddy field increases .in soil.<\/p>\n

                                                      \n
                                                    1. Phosphorus<\/li>\n
                                                    2. Nitrogen<\/li>\n
                                                    3. Sulphur<\/li>\n
                                                    4. Potassium<\/li>\n<\/ol>\n

                                                      Answer: 2. Nitrogen<\/p>\n

                                                      Question 27. Nostoc is a\u2014<\/p>\n

                                                        \n
                                                      1. Nitrogen-fixing protozoa<\/li>\n
                                                      2. Nitrogen-fixing cyanobacteria<\/li>\n
                                                      3. Symbiotic fungus<\/li>\n
                                                      4. Green algae<\/li>\n<\/ol>\n

                                                        Answer: 2. Nitrogen-fixing cyanobacteria<\/p>\n

                                                        Question 28. Which of the following organisms is not used as a bio-fertilizer?<\/p>\n

                                                          \n
                                                        1. Rhizobium<\/li>\n
                                                        2. Lichen<\/li>\n
                                                        3. Azotobacter<\/li>\n
                                                        4. Azollci<\/li>\n<\/ol>\n

                                                          Answer: 2. Lichen<\/p>\n

                                                          Question 29. Insoluble phosphate of soil is transformed into soluble phosphate by\u2014<\/p>\n

                                                            \n
                                                          1. Azolla<\/li>\n
                                                          2. Nos toe<\/li>\n
                                                          3. Rhizobium<\/li>\n
                                                          4. Pseudomonas putida<\/li>\n<\/ol>\n

                                                            Answer: 4. Pseudomonas putida<\/p>\n

                                                            Question 30. Sweet pea plants can grow in infertile land because of\u2014<\/p>\n

                                                              \n
                                                            1. Azotobacter<\/li>\n
                                                            2. Clostridium<\/li>\n
                                                            3. Rhizobium<\/li>\n
                                                            4. Anabaena<\/li>\n<\/ol>\n

                                                              Answer: 3. Rhizobium<\/p>\n

                                                              Question 31. The microbe which does not have any role as a bio-fertilizer is\u2014<\/p>\n

                                                                \n
                                                              1. Bacteria<\/li>\n
                                                              2. Cyanobacteria<\/li>\n
                                                              3. Fungus.<\/li>\n
                                                              4. Protozoa<\/li>\n<\/ol>\n

                                                                Answer: 4. Protozoa<\/p>\n

                                                                Question 32. Cyanobacterial colony is formed in\u2014<\/p>\n

                                                                  \n
                                                                1. Equisitum<\/li>\n
                                                                2. Cycas<\/li>\n
                                                                3. Psilotum<\/li>\n
                                                                4. Pinus<\/li>\n<\/ol>\n

                                                                  Answer: 2. Cycas<\/p>\n

                                                                  WBBSE Class Nine Life Science<\/strong><\/p>\n

                                                                  Question 33. A fungal bio-control agent is\u2014<\/p>\n

                                                                    \n
                                                                  1. Nosema<\/li>\n
                                                                  2. Beauveria bassiana<\/li>\n
                                                                  3. Popillajaponica<\/li>\n
                                                                  4. Mattesia grandis<\/li>\n<\/ol>\n

                                                                    Answer: 2. Beauveria bassiana<\/p>\n","protected":false},"excerpt":{"rendered":"

                                                                    WBBSE Class 9 Life Science Chapter 4 Biology And Human Welfare Microbes In Human Welfare Multiple Choice Questions Question 1. Microbes are\u2014 Virus Bacteria Protozoa All of these Answer: 4. All of these Question 2. The term \u2018microbe\u2019 was coined by\u2014 Robert Hook Sedillot Robert Brown Leeuwenhoek Answer: 2. Sedillot Question 3. Azolla maintains a … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[9],"tags":[],"yoast_head":"\nWBBSE Class 9 Life Science Chapter 4 Microbes In Human Welfare Multiple Choice Questions - WBBSE Solutions<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/wbbsesolutions.net\/wbbse-class-9-life-science-chapter-4-microbes-in-human-welfare-mcqs\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"WBBSE Class 9 Life Science Chapter 4 Microbes In Human Welfare Multiple Choice Questions - WBBSE Solutions\" \/>\n<meta property=\"og:description\" content=\"WBBSE Class 9 Life Science Chapter 4 Biology And Human Welfare Microbes In Human Welfare Multiple Choice Questions Question 1. 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Microbes are\u2014 Virus Bacteria Protozoa All of these Answer: 4. All of these Question 2. The term \u2018microbe\u2019 was coined by\u2014 Robert Hook Sedillot Robert Brown Leeuwenhoek Answer: 2. Sedillot Question 3. Azolla maintains a ... 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