Microbiology Question Bank PDF book covers problem solving exam tests from microbiology textbook and practical book's chapters as: Chapter 1: Basic Mycology MCQs. b) Fermented dairy products pH, cations, thymidine or thymine, use of supplemented media). View Answer, 18. 1. Automatic Type Counter & Classifier Answer: C Diagram and name four mechanisms bacteria use to transport materials across the cytoplasmic membrane. c) Spirillum volutans What is required for proper isolation of microorganisms? Our 1000+ MCQs focus on all topics of the Microbiology subject, covering 100+ topics. Sulphur can be utilized by bacteria in the a. 1999-2023, Rice University. b) coliforms They are mainly of two types: Primary and Secondary Screening Primary Screening : The effective screening must in one or few steps which allow the discarding of many valueless microorganisms, while at the . d) Amino acid producers The objective of this study was to isolate, identify, and screen the potential antimicrobial-producing . c) Psychrophile 5. D. Indicator dye technique. Candidiasis is a fungal infection, skin infection, and mouth or vaginal infection that can occur due to the overgrowth of the fungus. Our members have a unique depth and breadth of knowledge about the discipline. 5. c) beta-glucosidase Which among the following is not an ammonia-oxidizing bacteria? It works best in this range and is also used as a tracking dye in Agarose-Gel Electrophoresis. 3. B. Protozoa that eat other organisms are known as _______________ Genetic engineering is also used to improve the biodegradation . Which of the following is the example of encapsulated gram-positive bacteria? The common symptoms are pink or red spots on the skin surface, dry cough, and runny nose. It is the zone where only the growth of a particular colony is observed whereas rest all colonies get degraded by antibiotics. 1. Symptoms include cough and lung infection. b) Auxanographic technique 4. [1] Infections are common both in community-acquired as well as hospital-acquired settings and treatment remains challenging to manage due to the emergence of multi-drug resistant strains such as MRSA (Methicillin-Resistant Staphylococcus aureus). b) Fungi B) False, The aim of industrial microbiology is to produce chemicals that can be purified and packaged for sale or used in other commercial processes. Which of the following was NOT a kingdom in Linnaeuss taxonomy? A) True View Answer, 19. The OpenStax name, OpenStax logo, OpenStax book covers, OpenStax CNX name, and OpenStax CNX logo Glycolysis can occur in ___________ A. 10-fold a) Final treatment Note when energy and additional compounds are necessary for any of these mechanisms to operate. What are the cell wall structural components of fungi? What is the approximate size of the bacterial cell? d) glucose residues c) parasitic infection C) is used to prevent growth of halophiles. Contact Us. d) cellulase View Answer, 16. d) Study of microscope Antibiotic producers Types of pathogens include specific bacteria strains, viruses, fungi, or parasites that can cause illness in its host. B) False, Hot foods must be maintained above 60 oC to inhibit microbial growth. Which of the following is a prokaryotic microorganism? b) Gram-positive organisms OpenStax is part of Rice University, which is a 501(c)(3) nonprofit. citation tool such as, Authors: Nina Parker, Mark Schneegurt, Anh-Hue Thi Tu, Philip Lister, Brian M. Forster. d) 2-fold (1) It is useful in sorting microorganisms that have real commercial value. Which of the following microorganism produces dextran? b) 10-fold Which of the following gram positive bacteria is a strict anaerobe and can only grow in the absence of oxygen? 3. d. using damaged equipment and glassware. a) Crowded plate technique First link in any food chain is usually green plants because. A) True D) small-scale production is used to synthesize product. Which of the following is a type of fungal microorganism? Screening includes primary screening and secondary screening. Which of the following is the most accurate method for microbial assay of antibiotics? They block floating debris such as wood, rags, and other bulky objects that could clog pipes or pumps. c) magnetic fields c) Study of organisms that are not visible to naked eyes Blood C. Electrolytes D. Water: 5. View Answer, 12. 5. If you would like to learn "Microbiology" thoroughly, you should attempt to work on the complete set of 1000+ MCQs - multiple choice questions and answers mentioned above. The process is repeated several times until the requirement is met. c) Enrichment Culture technique MCQ Questions for Class 8 Science: Ch 2 Microorganisms: Friend and Foe. D. The organism must be able to grow in an easily available nutrient medium. d) 5 percent The section contains MCQs on microorganisms, industry, industrial uses of bacteria, molds and yeasts, genotypic changes, bacterial recombination and conjugation, bacterial transduction and transformation. Answer: 4. d) Nitrosovibrio tenuis C) 72 oC for 15 seconds. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution License . a) Alcoholic beverages c) fecal streptococci The process is repeated several times until the requirement is met. Our mission is to improve educational access and learning for everyone. 11. True b) aerobic cells Rhizobium bacteria. B. Auxanographic technique It should not leave damage and odour. Clarification: The Auxanographic technique is used for the detection and isolation of the organisms which are growth factor producers. b) Streak-plate 9. b) Treponema pallidum d) Indicator dye technique The prototrophs are the organisms which are not capable of synthesizing all growth requirements for themselves. Trophic level in an ecosystem represents. Secondary screening helps in detecting really useful microorganisms in fermentation processes, which includes D. Hanging Drop technique. c) prophage Growth Factor producers We recommend using a b) Corticoviridae b) False 5. a) plasmid View Answer, 6. a) Algae It is important to find and resolve the source of the contamination. The organic acid producers produce acid which changes the colour of media and is thus detected easily. 26. b) an increase in number of cells b) False b) Biological assay C. Enrichment Culture technique In this process desired microorganism is generally isolated from a natural environment like soil, which . The "flash method" or "high temperature short time" method exposes fluids to This includes bacteria, archaea, viruses, fungi, prions, protozoa and algae, collectively known as 'microbes'. 13. 9. Clarification: The Antibiotic producers show the zone of inhibition. b) mutualistic Answer: D A test tube contains 9ml distilled water. b. not washing hands before and after lab . c) Chlorella B. Auxanographic technique Indeed, until Anton von Leeuwenhoek invented . d) Cristispira b) Viruses a) Lactobacillus 13. Universal aseptic techniques includes, Except a) Gown b) Mask c) Cough Etiquettes d) Hand washing answer-D 4. How to avoid the spreading of Microorganisms has been discussed. lack of cell wall. d) Pour plate View Answer, 10. c) Enrichment Culture technique The organism must be genetically stable Therefore, in screening experiments for the selection of PGPM it is necessary to know about the environmental requirements of the target plant and . b) 8.0 10.0 Crowded plate technique Therefore, the exact composition of a defined medium is known. 3. C. perfringens is a spore-forming bacteria, that produce H 2 S and hemolysis on blood agar. A. A. B) using small scale containers to concentrate production. View Answer, 31. Primary treatment removes material that will either float or readily settle out by gravity. C) inoculation, fermentation, downstream processing, removal of waste. Which of the following plate is used to detect and isolate organic acid producers? To practice all areas of Fermentation Technology for Interviews, here is complete set of 1000+ Multiple Choice Questions and Answers. View Answer. View Answer, 38. Clarification: The use of Indicator Dye Technique is used for detection and isolation of the organisms which are organic acid producers. b) The organism must be able to produce a high yield of product Answer: B a) DNA polymerase III c) AIDS a) The organism must be genetically stable 4. Who proposed that swamps might harbor tiny, disease-causing animals too small to see? 3. Thank you so much for sharing. Measles is a disease caused by a virus, it is spread via respiratory droplets. Screens are made of long, closely spaced, narrow metal bars. All the microorganisms such as amoeba, protozoa, viruses, bacteria are studied under microbiology. b) Acanthopeltis The respiratory chain of bacteria is associated with the _____________ This will help you to prepare for exams, contests, online tests, quizzes, viva-voce, interviews, and certifications. a) The organism must be genetically stable. Wish you the best in your endeavor to learn and master Microbiology! A) organic acids. 1. a. the virus must be able to cross-link red blood cells directly. C. Enrichment Culture technique Answer: 4. E. coli is a sub-group of the fecal coliform group. c) Phenolphthalein A test tube contains 9ml distilled water. Crowded plate technique is used for screening of____________. Identify bacteriophage. c) 1000-fold Some of the frequently asked exam questions are as follows:-. 2011-2023 Sanfoundry. b) Advanced treatment b) Xanthophycophyta All Rights Reserved. View Answer. View Answer, 6. Entrepreneurship Development MCQ with Answers, MHT CET Chapterwise Questions Pdf free Download. View Answer, 13. He came with a lesion on the lower part of the left leg that according to him first appeared about a week before visiting the hospital. What is the name of the procedure performed under sterile conditions to eliminate 10. The section contains multiple choice questions and answers on soil microorganisms interactions, nitrogen, carbon and sulphur cycles, aquatic environment, aquatic microorganisms techniques and productivity. b) The organism must be able to produce a high yield of product. View Answer, 20. The section contains questions and answers on control fundamentals, physical agents, chemical agents characteristics, antimicrobial agents groups and antimicrobial chemical agents evaluation. Crowded plate technique In batch fermentation, A food chain comprising birds, green plants, fish and man. A) are among the most widely used preservatives. View Answer, 47. A) manipulating the growth environment. View Answer, 27. Pathogen testing is used to identify pathogenic organisms in manufacturing environments, ingredients or finished products that could harm the consumer. 11. d) Multiple fission A. The bacterium Staphylococcus aureus is which type of bacteria? b) Potato Dextrose Agar plate View Answer, 44. 8.0 10.0 The colour of plate changes from red to yellow in the zone of organisms producing organic acid. 7. c) nucleotides b) Automatic Type Counter & Classifier Bacterial cell grown on hydrocarbon wastes from the petroleum industry are a source of _____________ In an ecosystem, herbivores represent. c. Let the soil particles settle after shaking and then transfer 1ml of the solution into tube 2. C) new batches of microorganisms are screened for increased yield. Lung infection was suspected, and a chest X-ray was performed which showed infection in both lungs. The section contains questions and answers on sanitary quality of water, wastewater, treatment processes, fresh foods microbial flora, food preservation and microorganisms. a) Phenol red plate Answer: C A) production of alcoholic beverages by microorganisms. View Answer, 10. Which of the following are present in teichoic acids? a) Neisseria gonorrhoeae. B. Thymol blue Done in one or few steps. d) Indicator dye technique A 24 year old sexually active woman had an infection in the vaginal area with genital discharge while urinating. a) 100-fold b) Ferdinand Cohn Your health care provider will insert a special tool called a speculum into your vagina. 2. 5. d) Antoni van Leeuwenhoek View Answer, 3. Creative Commons Attribution License 16) A bacteriological stain also known as the differential stain is used for the identification of acid-fast organisms, Which of the following metabolic property differentiate the pink-colored colonies of. Official Website of Dr. Shyama Prasad Mukherjee University, Ranchi . 15. 5.6 - 8.2 form of c. 3.0 - 6.0 d. 8.0 - 14.0 a. Organic compounds b. Inorganic compounds 14. C. Enrichment Culture technique b) Borrelia d) Coliform bacteria. a) Crowded plate technique Gram negative bacteria take the color of safranin stain and appear pink or red. a) above 1 percent Sanfoundry Global Education & Learning Series Fermentation Technology. Includes common viruses, bacteria, and parasites 1,2: Stool sample: Sensitive, certain positive results may be unrelated to active infection. d) Indicator dye technique A) fermentation, downstream processing, removal of waste, inoculation. Which of the following yeast can be used to produce microbial protein? and you must attribute OpenStax. C. The optimum temperature for the growth of an organism must be above 50C Children are more susceptible to this disease. Bacteria having clusters of flagella at both poles of cells are known as? Ans: The steps adopted in a typical sewage treatment plant are as given below: ADVERTISEMENTS: View Answer, 2. includes 6 urine samples. c) DNA polymerase I B. Auxanographic technique Which one of the following organisms is least likely to cause this illness? A routine GTT: is three hours long. other viruses are too dangerous to work with in a clinical lab setting. d) proteins 1. 3. d) chitin, cellulose, or hemicellulose b) plaque a) glycerol residues View Answer, 41. Cystic fibrosis is an inherited disease, infection in the lungs and digestive system. d) Rose Bengal Agar plate 10. answer choices. Which of the following method is useful for the isolation and detection of organisms having the ability to produce antibiotics? a) Crowded plate technique Plasmodium divides by which of the following method most commonly? The normal composition of feces includes all of the following except: A. Bacteria B. c) Spirochetes Which of the following is not a subfield of microbiology? 2. 1. a) Methyl red Which of the following method is useful for isolation and detection of organisms having the ability to produce growth factors? Which of the following plate is used to detect and isolate organic acid producers? D) are harvested during the exponential phase of growth. A. Fecal occult blood B. Clarification: Adenoviruses cause respiratory infections. Clarification: Screening is the use of highly selective procedures to allow the detection and isolation of only those microorganisms of interest from a large microbial population. It is used to reduce the dense culture of cells to usable concentration. c) Crick View Answer, 8. (Or show it to your microbiology professor, just for fun.) Clarification: Phenolphthalein has a pH range between 8.0 10.0. Chrysolaminarin is the reserved food of ___________________ c) Streptococcus thermophilus Which among the following is a pathogenic algae for humans? Best method of sterilization at commercial level is a) Hot air oven b) Autoclaving c) Radiation d) Sun light answer-C 5. c) Organic acid producers View Answer, 5. Which of the following is a correct usage of binomial nomenclature? b) Killing pathogenic microorganisms c) Killing spores d) None of these answer-A 3. A 19-year-old male living in a tropical region of India visited the hospital. Clarification: The question mark in the following figure represents flagella of a rod-shaped bacterium. A) are essential to microbe function. _______ are the agents that act as carriers of a pathogen and spread diseases. Microbiology is the study of : 3. 5. d) saprophytic View Answer, 14. D. Indicator dye technique. False. c) ribitol or glycerol residues Which of the following media is used for screening amylase? Incorporation of CaCO3 in medium is also used to__________. 14. Sugar fermentation test: Bacteria is grown in a sugar media. C. 1000-fold 3.0 4.6 Microbiology is the study of living organisms that are not visible to the naked eyes. Which organisms show the zone of inhibition grown on a Petri plate? Clarification: The optimum temperature for the growth of an organism should be above 40C. a) Growth Factor producers It includes the physical processes of screening, comminution, grit removal, and sedimentation. Eubacteria are prokaryotic microorganisms consisting of a single cell lacking a nucleus and containing DNA is a single circular chromosome. For this dilution, it may be said that the solution was diluted _______ Crowded plate technique It is 50,000X magnified image of a bacterium. C) alcohol. d) The organism must be able to grow in an easily available nutrient medium. Which of the following inhibits DNA replication? d) Fungi Detrimental effects of microorganisms in food include, Fermentation of grains usually results in production of, During malting, barley and other grains are broken down by, Milk fermentation to produce cheese is done initially by inoculating with, Pickles and sauerkraut share a common inoculum, which is. b) teichoic acid d) Phaeophycophyta Chapter 3: Classification of Viruses MCQs. Biotechnology, the practical application of microorganisms in making products for human use, is a relatively new science, begun since Pasteur's time. 3. D. 6.4 8.0. 15. The section contains multiple choice questions and answers on microorganisms characteristics and microbial classification. The section contains multiple choice questions and answers on viruses, vaccination, structure, composition, viruses classification, virus infection and fatal diseases. a. Streptococcus pyogens b. Secondary screening helps in detecting really useful microorganisms in fermentation processes, which includes, (1) Detection and isolation of microorganisms that possess potentially interesting industrial application, (3) It helps in providing information regarding the product yield potentials of different isolates. 13. consent of Rice University. a) anaerobic cells a) parasitic b) cellulose 5. View Answer, 4. Bacteria do not grow at a water activity level below 0.91 and require neutral pH (6.5-7) to cause food spoilage (e.g. The section contains questions and answers on biological and economic importance of algae, algae characteristics and classification, ecology and protozoa importance, protozoa characteristics, protozoa morphology and reproduction. Which of the following is a family of lambda phage viruses? For e.g., cellulose producers grow on nutrient medium supplied with cellulose. B. b) Magnifying lens c) carbohydrates Answer: A A. Some bacteria are capable of spore formation so they are highly heat resistant and some are capable of producing heat-resistant toxins. a) Small pox b) Thymol blue Auxanography technique is employed for detecting microorganisms able to produce__________. a) peptidoglycan Phosphorus is essential component of __________ Which of the following dye is colourless at acidic pH and becomes red at basic pH? d) Phenol red Which of the following is NOT a criterion for the choice of an organism? Which of the following is the source of Vitamin A. The normal brown color of the feces is produced by: A. Cellulose B. Pancreatic enzyme Biological contaminants occur in the air as aerosols and may include bacteria, fungi, viruses, and pollens. Who proposed that swamps might harbor tiny, disease-causing animals too small to see? The screening is isolation and detection of microorganisms of interest. 100-fold In screening studies, it is recommended to use non-sterile soil, test different inoculation methods and different abiotic stresses, and even select microorganisms from plants under abiotic stress. c) Peritrichous Bacteria or other organisms used in AST testing should be from a fresh culture, ii) the composition and preparation of the agar and broth media used (e.g.