{"id":753292,"date":"2025-01-16T15:11:50","date_gmt":"2025-01-16T09:41:50","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/?p=753292"},"modified":"2025-05-15T11:09:33","modified_gmt":"2025-05-15T05:39:33","slug":"cbse-class-11-microbiology-mcqs","status":"publish","type":"post","link":"https:\/\/infinitylearn.com\/surge\/mcqs\/class-11-biology-microbiology\/","title":{"rendered":"CBSE Class 11 Microbiology MCQs"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_37 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><label for=\"item\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input type=\"checkbox\" id=\"item\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' style='display:block'><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/infinitylearn.com\/surge\/mcqs\/class-11-biology-microbiology\/#Microbiology_MCQs\" title=\"Microbiology MCQs\">Microbiology MCQs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/infinitylearn.com\/surge\/mcqs\/class-11-biology-microbiology\/#CBSE_Class_11_Microbiology_MCQs_with_Answers\" title=\"CBSE Class 11 Microbiology MCQs with Answers\">CBSE Class 11 Microbiology MCQs with Answers<\/a><\/li><\/ul><\/nav><\/div>\n<p><strong>CBSE Class 11 Microbiology MCQs:<\/strong> Microbiology is a vital subject in the <a href=\"https:\/\/infinitylearn.com\/surge\/cbse\/cbse-class-11-biology-syllabus\/\"><strong>CBSE Class 11 Biology syllabus<\/strong><\/a>, which covers various aspects of microorganisms, their classification, roles, and interactions in different environments. For students preparing for the <a href=\"https:\/\/infinitylearn.com\/surge\/neet-exam\"><strong>NEET exam<\/strong><\/a>, mastering microbiology concepts is crucial as they form an integral part of the Biology MCQs in the NEET Biology section. These MCQs are designed to test your understanding of the microscopic world, from bacteria and viruses to fungi and algae. The Class 11 Biology curriculum provides a foundation for further learning in microbiology, while <strong>NEET Biology MCQs<\/strong> demand in-depth knowledge and application of these concepts in complex problem-solving scenarios. The following MCQs on microbiology are crafted to help you revise and prepare efficiently, ensuring a better grasp of the topic for both CBSE exams and the NEET exam.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone wp-image-753338 size-full\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2025\/01\/CBSE-Class-11-Microbiology-MCQs-copy.jpg\" alt=\"CBSE Class 11 Microbiology MCQs \" width=\"1280\" height=\"800\" srcset=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2025\/01\/CBSE-Class-11-Microbiology-MCQs-copy.jpg 1280w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2025\/01\/CBSE-Class-11-Microbiology-MCQs-copy-300x188.jpg 300w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2025\/01\/CBSE-Class-11-Microbiology-MCQs-copy-1024x640.jpg 1024w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2025\/01\/CBSE-Class-11-Microbiology-MCQs-copy-768x480.jpg 768w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2025\/01\/CBSE-Class-11-Microbiology-MCQs-copy-150x94.jpg 150w\" sizes=\"(max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Microbiology_MCQs\"><\/span>Microbiology MCQs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Microbiology is a branch of biology that deals with the study of microorganisms, which include bacteria, viruses, fungi, algae, and protozoa. It focuses on understanding their structure, classification, behavior, interactions, and roles in various ecosystems. Microbiology is an essential topic in Class 11 Biology under the <a href=\"https:\/\/infinitylearn.com\/surge\/cbse\/cbse-syllabus\/\"><strong>CBSE syllabus<\/strong><\/a>. It is covered in topics such as the diversity of microorganisms, their significance in processes like fermentation, and their role in disease causation, both in humans and plants.<\/p>\n<p><strong>Definition of Microbiology:<\/strong> <a href=\"https:\/\/infinitylearn.com\/surge\/biology\/microbiology\/\"><strong>Microbiology<\/strong> <\/a>is the scientific study of microorganisms, their characteristics, and their interactions with humans, animals, plants, and the environment. This field is crucial for medical science, environmental studies, and biotechnology.<\/p>\n<p><strong>Examples of Microorganisms:<\/strong><\/p>\n<ul>\n<li><strong>Bacteria:<\/strong> Escherichia coli (E. coli), which can live in the intestines of humans and other animals.<\/li>\n<li><strong>Viruses:<\/strong> Influenza virus, which causes flu.<\/li>\n<li><strong>Fungi:<\/strong> Saccharomyces cerevisiae, used in baking and brewing industries.<\/li>\n<li><strong>Algae:<\/strong> Chlorella, a single-celled green algae that is used in nutritional supplements.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"CBSE_Class_11_Microbiology_MCQs_with_Answers\"><\/span>CBSE Class 11 Microbiology MCQs with Answers<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>1. Which of the following is not a characteristic of prokaryotic cells?<\/strong><br \/>\na) Absence of membrane-bound organelles<br \/>\nb) Presence of a well-defined nucleus<br \/>\nc) Presence of ribosomes<br \/>\nd) Presence of a plasma membrane<br \/>\nAnswer: b) Presence of a well-defined nucleus<\/p>\n<p><strong>2. Which microorganism is responsible for tuberculosis?<\/strong><br \/>\na) Bacillus anthracis<br \/>\nb) Mycobacterium tuberculosis<br \/>\nc) Escherichia coli<br \/>\nd) Staphylococcus aureus<br \/>\nAnswer: b) Mycobacterium tuberculosis<\/p>\n<p><strong>3. Which of the following is the primary role of fungi in an ecosystem?<\/strong><br \/>\na) Producers of oxygen<br \/>\nb) Producers of glucose<br \/>\nc) Decomposers of organic matter<br \/>\nd) Symbiotic nitrogen fixers<br \/>\nAnswer: c) Decomposers of organic matter<\/p>\n<p><strong>4. In which phase of the bacterial growth curve does the population grow at a constant rate?<\/strong><br \/>\na) Lag phase<br \/>\nb) Exponential phase<br \/>\nc) Stationary phase<br \/>\nd) Death phase<br \/>\nAnswer: b) Exponential phase<\/p>\n<p><strong>5. Which is the main constituent of the bacterial cell wall in Gram-positive bacteria?<\/strong><br \/>\na) Peptidoglycan<br \/>\nb) Lipopolysaccharides<br \/>\nc) Cellulose<br \/>\nd) Chitin<br \/>\nAnswer: a) Peptidoglycan<\/p>\n<p><strong>6. Which one of the following is used for the sterilization of surgical instruments?<\/strong><br \/>\na) UV light<br \/>\nb) Heat<br \/>\nc) Gamma radiation<br \/>\nd) Boiling water<br \/>\nAnswer: b) Heat<\/p>\n<p><strong>7. Which of the following viruses is known for causing the common cold?<\/strong><br \/>\na) Influenza virus<br \/>\nb) Rhinovirus<br \/>\nc) Hepatitis virus<br \/>\nd) HIV virus<br \/>\nAnswer: b) Rhinovirus<\/p>\n<p><strong>8. What type of symbiotic relationship is formed between Rhizobium and leguminous plants?<\/strong><br \/>\na) Parasitism<br \/>\nb) Commensalism<br \/>\nc) Mutualism<br \/>\nd) Predation<br \/>\nAnswer: c) Mutualism<\/p>\n<p><strong>9. Which is the mode of transmission of Malaria?<\/strong><br \/>\na) Airborne<br \/>\nb) Vector-borne (Anopheles mosquito)<br \/>\nc) Direct contact<br \/>\nd) Contaminated water<br \/>\nAnswer: b) Vector-borne (Anopheles mosquito)<\/p>\n<p><strong>10. The process of genetic material exchange between two bacterial cells through direct contact is called:<\/strong><br \/>\na) Transformation<br \/>\nb) Transduction<br \/>\nc) Conjugation<br \/>\nd) Binary fission<br \/>\nAnswer: c) Conjugation<\/p>\n<p><strong>11. Which of the following is the causative agent of cholera?<\/strong><br \/>\na) Salmonella typhi<br \/>\nb) Vibrio cholerae<br \/>\nc) Clostridium tetani<br \/>\nd) Escherichia coli<br \/>\nAnswer: b) Vibrio cholerae<\/p>\n<p><strong>12. What is the main function of the bacterial capsule?<\/strong><br \/>\na) Protein synthesis<br \/>\nb) Protection against desiccation<br \/>\nc) Protection from phagocytosis<br \/>\nd) DNA replication<br \/>\nAnswer: c) Protection from phagocytosis<\/p>\n<p><strong>13. Which of the following is an example of a viral disease?<\/strong><br \/>\na) Tuberculosis<br \/>\nb) Hepatitis B<br \/>\nc) Malaria<br \/>\nd) Leprosy<br \/>\nAnswer: b) Hepatitis B<\/p>\n<p><strong>14. The process of converting atmospheric nitrogen into a usable form for plants is called:<\/strong><br \/>\na) Nitrogen fixation<br \/>\nb) Denitrification<br \/>\nc) Ammonification<br \/>\nd) Nitrification<br \/>\nAnswer: a) Nitrogen fixation<\/p>\n<p><strong>15. Which of the following microorganisms is commonly used in the production of yogurt?<\/strong><br \/>\na) Aspergillus<br \/>\nb) Saccharomyces<br \/>\nc) Lactobacillus<br \/>\nd) Bacillus<br \/>\nAnswer: c) Lactobacillus<\/p>\n<p><strong>16. Which of the following is a characteristic of viruses?<\/strong><br \/>\na) Can reproduce on their own<br \/>\nb) Contain both RNA and DNA<br \/>\nc) Cannot reproduce outside a host cell<br \/>\nd) Have a well-defined nucleus<br \/>\nAnswer: c) Cannot reproduce outside a host cell<\/p>\n<p><strong>17. Which of the following is used for the identification of bacteria?<\/strong><br \/>\na) Gram staining<br \/>\nb) PCR technique<br \/>\nc) Electrophoresis<br \/>\nd) Both a and b<br \/>\nAnswer: d) Both a and b<\/p>\n<p><strong>18. Which bacterium is known to fix nitrogen in the root nodules of leguminous plants?<\/strong><br \/>\na) Escherichia coli<br \/>\nb) Bacillus subtilis<br \/>\nc) Rhizobium<br \/>\nd) Clostridium<br \/>\nAnswer: c) Rhizobium<\/p>\n<p><strong>19. Which of the following is the primary vector for the transmission of the Dengue virus?<\/strong><br \/>\na) Anopheles mosquito<br \/>\nb) Culex mosquito<br \/>\nc) Aedes mosquito<br \/>\nd) Tsetse fly<br \/>\nAnswer: c) Aedes mosquito<\/p>\n<p><strong>20. Which bacteria are known for their ability to photosynthesize?<\/strong><br \/>\na) Cyanobacteria<br \/>\nb) Streptococcus<br \/>\nc) Clostridium<br \/>\nd) Mycobacterium<br \/>\nAnswer: a) Cyanobacteria<\/p>\n<p><strong>21. Which of the following is a function of the endospores in bacteria?<\/strong><br \/>\na) Reproduction<br \/>\nb) Protection from extreme conditions<br \/>\nc) Respiration<br \/>\nd) Protein synthesis<br \/>\nAnswer: b) Protection from extreme conditions<\/p>\n<p><strong>22. What is the main purpose of Koch\u2019s postulates?<\/strong><br \/>\na) To determine the method of bacterial reproduction<br \/>\nb) To identify the specific organism causing a disease<br \/>\nc) To study the effects of antibiotics<br \/>\nd) To classify different bacteria<br \/>\nAnswer: b) To identify the specific organism causing a disease<\/p>\n<p><strong>23. Which is the largest known virus?<\/strong><br \/>\na) T4 bacteriophage<br \/>\nb) Influenza virus<br \/>\nc) Variola virus<br \/>\nd) Mimivirus<br \/>\nAnswer: d) Mimivirus<\/p>\n<p><strong>24. Which of the following is NOT a characteristic of viruses?<\/strong><br \/>\na) Contain either DNA or RNA<br \/>\nb) Can be crystallized<br \/>\nc) Can reproduce independently<br \/>\nd) Lack cellular structures<br \/>\nAnswer: c) Can reproduce independently<\/p>\n<p><strong>25. Which type of bacteria is known to cause food poisoning?<\/strong><br \/>\na) Streptococcus<br \/>\nb) Salmonella<br \/>\nc) Lactobacillus<br \/>\nd) Mycobacterium<br \/>\nAnswer: b) Salmonella<\/p>\n<p><strong>26. Which of the following is a type of symbiotic relationship between two organisms where one benefits and the other is harmed?<\/strong><br \/>\na) Mutualism<br \/>\nb) Commensalism<br \/>\nc) Parasitism<br \/>\nd) Cooperation<br \/>\nAnswer: c) Parasitism<\/p>\n<p><strong>27. Which of the following is responsible for antibiotic resistance in bacteria?<\/strong><br \/>\na) Gene transfer through conjugation<br \/>\nb) Horizontal gene transfer<br \/>\nc) Mutation<br \/>\nd) All of the above<br \/>\nAnswer: d) All of the above<\/p>\n<p><strong>28. Which type of microorganisms are used for the production of alcoholic beverages?<\/strong><br \/>\na) Yeasts<br \/>\nb) Bacteria<br \/>\nc) Protozoa<br \/>\nd) Algae<br \/>\nAnswer: a) Yeasts<\/p>\n<p><strong>29. Which of the following diseases is caused by a prion?<\/strong><br \/>\na) Mad cow disease<br \/>\nb) Tuberculosis<br \/>\nc) Hepatitis<br \/>\nd) Malaria<br \/>\nAnswer: a) Mad cow disease<\/p>\n<p><strong>30. Which of the following is an example of a microbial bioremediation process?<\/strong><br \/>\na) Nitrogen fixation<br \/>\nb) Oil spill cleanup<br \/>\nc) Carbon fixation<br \/>\nd) Oxygen production<br \/>\nAnswer: b) Oil spill cleanup<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CBSE Class 11 Microbiology MCQs: Microbiology is a vital subject in the CBSE Class 11 Biology syllabus, which covers various [&hellip;]<\/p>\n","protected":false},"author":53,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"Microbiology MCQs","_yoast_wpseo_title":"CBSE Class 11 Microbiology MCQs with Answers","_yoast_wpseo_metadesc":"Explore a comprehensive collection of CBSE Class 11 Microbiology MCQs to help you prepare effectively for exams.","custom_permalink":"mcqs\/class-11-biology-microbiology\/"},"categories":[11038],"tags":[],"table_tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with 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