2. B) False, Pasteurization is used to sterilize milk. Clarification: The Crowded Plate Technique is used for the detection and isolation of the organisms which are antibiotic producers. c) chitin Urinary tract infection was suspected, urine sample and swab specimen were taken and cultured on suitable agar media, a microscopic examination was performed. The microbes play a major role in nutrient cycling, decomposition, food spoilage, control and cause of diseases and biotechnology. c) American Type Counter Collection MCQ on Our Environment Question 9. B. Auxanographic technique The microorganisms are chosen based on the rest three criteria. b) Streptomyces olivaceus c) 2.5 to 4 percent 3. Answer: 1. b) 8.0 10.0 Which of the following method is not used in isolation and screening of desired microorganisms? Each of the following organisms is an important cause of urinary tract infections except: a. Klebsiella pneumoniae b. Escherichia coli c. Bacteriodes fragilis d. Proteus mirabilis; A 30-year woman has non-bloody diarrhea for the past 14 hours. (adsbygoogle = window.adsbygoogle || []).push({}); Engineering interview questions,Mcqs,Objective Questions,Class Lecture Notes,Seminor topics,Lab Viva Pdf PPT Doc Book free download. a) Edwin John Butler The greatest resolution in light microscopy can be obtained with ___________ Answer: B a) elongated A. American Type Culture Collection Automatic Type Counter & Classifier c) Desulfotomaculum sp. microscopic with a fried egg shape. View Answer, 19. b) Rhodospirillum Which scientist proposed adding a kingdom for protists? B) nutrients are continuously fed into the reactor and the product is siphoned off during the run. B) using small scale containers to concentrate production. Defined media and complex media are two broad classes of culture media used in microbiology. a) Small pox Measles is a disease caused by a virus, it is spread via respiratory droplets. a) Crowded plate technique c) An objective with minimum numerical aperture Microbes can live in highly acidic as well as an alkaline medium. Antibiotic producing microorganisms can be detected by the method__________, 5. Eubacteria are prokaryotic microorganisms consisting of a single cell lacking a nucleus and containing DNA is a single circular chromosome. b) Longest wavelength of visible light used Which of the following method is useful for the isolation and detection of organisms having the ability to produce antibiotics? Rickettsia species are carried by. The science of using living systems to benefit humankind is called biotechnology.Technically speaking, the domestication of plants and animals through farming and breeding practices is a type of biotechnology. d) mitochondrial membrane D. Indicator dye technique. A test tube contains 9ml distilled water. What are the cell wall structural components of fungi? Answer: A 5. Binary fission begins when the DNA of the bacterium divides into two (replicates). Secondary screening should yield the types of information which are needed in order to evaluate the true potential of a microorganisms industrially usage. a) Rod-shaped b) Comma shaped c) Spiral shaped d) Spherical shaped Answer: a Clarification: The following diagram represents rod-shaped bacteria, magnified 1500X. Secondary screening should yield the types of information which are needed in order to evaluate the true potential of a microorganisms industrially usage. For this dilution, it may be said that the solution was diluted _______ c) Breads d) Indicator dye technique b) irregular Crowded plate technique The section contains MCQs on phages structure and morphology, bacterial viruses replication, lysogeny and lytic. Antibiotic producers Here are 1000 MCQs on Microbiology (Chapterwise), The Characterization, Classification and Identification of Microorganisms, The Microscopic Examination of Microorganisms, The Morphology and Fine Structure of Bacteria, Pure Cultures and Cultural Characteristics, Microbial Metabolism : Utilization of Energy and Biosynthesis, The Control of Microorganisms by Physical & Chemical Agents, Antibiotics and Other Chemotherapeutic Agents, Microbiology of Soil & Aquatic Microbiology, Microbiology of Domestic Water and Wastewater, Microbiology of Food, Industrial Microbiology & Bacterial Genetics, Microbial Flora of the Healthy Human Host, Host-Microbe Interactions : The Process of Infection, Microbial Agents of Disease : Bacteria & Viruses, Microbial Agents of Disease : Fungi and Protozoa, Microbiology MCQ: Major Characteristics of Microorganisms, Microbiology MCQ: Microbial Classification, Microbiology MCQ: Transmission Electron Microscope and Scanning Electron Microscope, 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Containing Double Stranded DNA, Microbiology MCQ: Diseases Caused by Fungi, Microbiology MCQ: Diseases Caused by Protozoa, Microbiology MCQ: Therapeutic Drugs for Treatment of Fungal and Protozoan Diseases, Environmental Biotechnology MCQ Questions, 1000 Data Structures & Algorithms II MCQs, 50k Electronics & Communication Engg MCQs. Which of the following is the example of encapsulated gram-positive bacteria? The screening is isolation and detection of microorganisms of interest. Most E. coli bacteria are harmless and are found in great quantities in the intestines of people and warm-blooded animals. View Answer, 42. View Answer. 9. a) Nitrospina gracilis The section contains MCQs on spirochetes, negative rods, cocci, facultatively anaerobic gram, rickettsias and chlamydias, mycoplasmas, positive cocci and positive bacteria. 6. Which shape of bacteria has been represented in the following diagram?a) Rod-shapedb) Comma shapedc) Spiral shapedd) Spherical shapedAnswer: aClarification: The following diagram represents rod-shaped bacteria, magnified 1500X. View Answer, 7. False. 5. Some strains, however, can cause illness. [2][3] S. aureus is found in the . A) are among the most widely used preservatives. True Bioremediation of polluants utilizing biodegradation abilities of microorganisms include the natural attenuation, although it may be enhanced by engineered techniques, either by addition of selected microorganisms (bioaugmentation) or by biostimulation, where nutrients are added. Staphylococcus aureus is a major bacterial human pathogen that causes a wide variety of clinical manifestations. 2. B. Lung infection was suspected, and a chest X-ray was performed which showed infection in both lungs. This quiz is designed to help you assess how well you have learned the content of this lesson. 10. View Answer, 12. a) anaerobic cells B) heat. Microorganisms are minute, unicellular organisms that aren't visible to the naked eye. 4. Who was the first to observe animalcules under the microscope? For e.g., cellulose producers grow on nutrient medium supplied with cellulose. a) Lactobacillus c) Enrichment Culture technique Home Class 12 Biology Objective Questions 250+ TOP MCQs on Microbes and Answers. Acridine orange is which type of mutagen? View Answer, 6. Screening includes primary screening and secondary screening. As an Amazon Associate we earn from qualifying purchases. B) inoculation, downstream processing, fermentation, removal of waste. A) True d) All of the mentioned View Answer, 9. are not subject to the Creative Commons license and may not be reproduced without the prior and express written c) The optimum temperature for the growth of an organism must be above 50C. Full-form of ATCC is _________ For which viral disease, vaccine has been recently developed through the use of tissue culture? Place the gram of soil into the first tube with saline and SHAKE WELL. Our 1000+ MCQs focus on all topics of the Microbiology subject, covering 100+ topics. screening of microorganisms includes mcqwarning signs for a deteriorating patient with covid 19 infection 2022.07.03 18:36 18:36 D) are harvested during the exponential phase of growth. Phagocytosis is a critical part of the immune system. A. a) plasmid D) starch. 1g of soil is added to that test tube and the soil is allowed to settle down. The bacterial cell then elongates and splits into two daughter cells each with identical DNA to the parent cell. Primary methods to prevent food spoilage do NOT include Water treatment typically requires three stages to make it potable from sewage. View Answer, 43. The section contains MCQs on size, shape and arrangement of bacterial cells, cell wall, structures external and internal to the cell wall. View Answer, 8. Microbiology is the study of living organisms that are not visible to the naked eyes. c) Mycobacterium tuberculosis 1999-2023, Rice University. 3. a) S mallpox D. American Type Classifier and Collection. Clarification: Auxanographic technique proceeds with 2-plate preparation. 3. Auxanography technique is employed for detecting microorganisms able to produce__________. b) teichoic acid D. 6.4 8.0. View Answer, 11. The process is repeated several times until the requirement is met. View Answer, 35. a) Crowded plate technique You can also check this one and can share your opinions on Cell Culture Plates Product. MCQ.8): In which of the following bacterial condition, fimbriae helps the bacteria to stick to the mucous membrane of the host? a) Vibrio cholerae It is done by using paper, thin layer or other chromatographic techniques. d) proteins c) beta-glucosidase b) Viruses Has three to five flagella at the posterior end B. View Answer, 45. 12. Often overlooked, hand-washing is one of the easiest and most effective ways to protect yourself from germs and most infections. View Answer, 24. Most Asked Technical Basic CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical | Medical MBBS Jobs Online Quiz Tests for Freshers Experienced . In this process the bacterium, which is a single cell, divides into two identical daughter cells. The section contains multiple choice questions and answers on nutritional requirements, bacteriological media and physical conditions growth. b. Litmus milk test: When bacteria is grown in this medium, there may be the production of acids or alkali or even no change in pH. 4. It gets its name from the Danish bacteriologist Hans Christian Gram who first introduced it in 1882, mainly to identify organisms causing pneumonia. The "flash method" or "high temperature short time" method exposes fluids to b) Nitrosococcus oceanus View Answer, 23. other viruses are too dangerous to work with in a clinical lab setting. Answer: B Butanol is obtained by fermenting molasses by. True. Which of the following method is useful for isolation and detection of organisms having the ability to produce organic acids? 9. Biology Multiple Choice Questions on Microbes. A) True 1. a) Bacillariophycophyta a) Amphitrichous d) Indicator dye technique Fecal coliform bacteria are a subgroup of total coliform bacteria. It works best in this range and is also used as a tracking dye in Agarose-Gel Electrophoresis. 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. then you must include on every digital page view the following attribution: Use the information below to generate a citation. a) glycerol residues Therefore, the exact composition of a defined medium is known. Which of the following are important primary screening techniques? B) False, When in doubt, throw it out. Now, 1ml of that stock solution is taken and transferred to the 2nd test tube containing 9ml of distilled water. Secondary screening may be qualitative and quantitative in its approach. C. The optimum temperature for the growth of an organism must be above 50C 4. It is done by using paper, thin layer or other chromatographic techniques. How do you isolate microorganisms from the soil? Crowded plate technique Lipopolysaccharide in cell walls is characteristic of? b) cell wall membranes of microorganisms. Prokaryotes are unicellular microorganisms whose cells have no nucleus. The respiratory chain of bacteria is associated with the _____________ A) production of alcoholic beverages by microorganisms. Which of the following method is useful for the isolation and detection of organisms having the ability to produce antibiotics? . A sputum sample was taken for the lab diagnosis for the isolation and identification of the microorganism. B. View Answer, 49. Juli 2022 Report an issue. Full-form of ATCC is _________ View Answer, 15. 13. Clarification: The use of Indicator Dye Technique is used for detection and isolation of the organisms which are organic acid producers. Pathogen testing is continuously performed throughout the production . c) Enrichment Culture technique c) AIDS View Answer, 33. (3) It does not provide many ideas about the production or yield potential of microorganisms. A) radiation. c) Enrichment Culture technique A) manipulating the growth environment. 26. 11 junio, 2022. D. Indicator dye technique. 10. The section contains MCQs on selective methods, pure cultures and cultural characteristics. the virus must be able to cross-link red blood cells directly. Q. Q.1: Screening of microorganisms includes . D) all of the above. Biotechnology, the practical application of microorganisms in making products for human use, is a relatively new science, begun since Pasteur's time. You can also download the PDF of Microbiology MCQs by applying below. Blood C. Electrolytes D. Water: 5. A) are essential to microbe function. d) Coxiella burnetii c) Robert Koch 13. 30 seconds. The normal composition of feces includes all of the following except: A. Bacteria B. Actinomycetes are Gram-positive, facultative anaerobic fungus-like filamentous bacteria which remain on the top of the natural antibiotic producers. Which part of the compound microscope helps in gathering and focusing light rays on the specimen to be viewed? What is Microbiology? B) False, Freezing at below -20 oC will kill most pathogenic food bacteria and inactivate toxins. coliform bacteria in drinking water, the source is probably environmental and fecal contamination is unlikely. 2. d) Coliforms Which of the following types of mutants can be isolated using the replica plate technique? D. Rose Bengal Agar plate. Primary screening of organic acids or amines producing organisms is done by__________, (2) Dye such as neutral red or bromothymol blue is used. MCQ Questions for Class 8 Science: Ch 2 Microorganisms: Friend and Foe. Secondary screening may be qualitative and quantitative in its approach. The Gram staining is one of the most crucial staining techniques in microbiology. Which is the secondary stage? 12. b) below 1 percent Potato Dextrose Agar plate Performance and sterility testing of media lots should also be determined and D. The organism must be able to grow in an easily available nutrient medium. d) 6.4 8.0 A skin biopsy test was performed and the infection was diagnosed to be a parasitic infection. answer choices. d) Bacillus polymyxa Which one of the following is called as the 'brewers yeast'. View Answer, 26. (Or show it to your microbiology professor, just for fun.) Who proposed that swamps might harbor tiny, disease-causing animals too small to see? a) peptidoglycan 4. A. Note when energy and additional compounds are necessary for any of these mechanisms to operate. c) 2mm in diameter View Answer, 5. d) DNA polymerase II OpenStax is part of Rice University, which is a 501(c)(3) nonprofit. It must be toxic to micro-organisms at concentrations well below the toxic thresholds of humans and higher animals so that it cannot negatively affect the animals or humans. a) Crowded plate technique All Rights Reserved. d) 5 percent d) glucose residues The organism must be able to produce a high yield of product Which among the following are Spirochetes? A test tube contains 9ml distilled water. Secondary screening helps in detecting really useful microorganisms in fermentation processes, which includes Q.1. c) UV light Screening - It refers to the isolation of only those microorganisms which are of interest from among a large population of microbes. chp 25 microbiology 211 mcq. Which was the first disease for which a chemotherapeutic agent was used? Thank you so much for sharing. Chrysolaminarin is the reserved food of ___________________ b) False b) transposons View Answer, 3. a. Streptococcus pyogens b. 3. Easy detection of the small percentage of useful microorganism. A. You can also prevent infections through: Hand-washing. B) False, Mass-produced microbial cells can be used as livestock feed. Which of the following is used in electron microscope? 2011-2023 Sanfoundry. Some of the frequently asked exam questions are as follows:-. Which of the following method is useful for detection and isolation of those microorganisms which are capable of growing on a particular nutrient medium? Bacterial cells grown in a medium exposed to high osmotic pressure, changes shape from rod-shaped to __________ shaped. d) intercalating agents d) Antoni van Leeuwenhoek (1) It is useful in sorting microorganisms that have real commercial value. 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. 4. Universal aseptic techniques includes, Except a) Gown b) Mask c) Cough Etiquettes d) Hand washing answer-D 4. a) Leuconostoc citrovorum Which of the following shows the zone of inhibition when a particular organism is grown on a Petri plate? a) True c) Saccharomyces cerevisiae The section contains questions and answers on diseases caused by staphylococcus, streptococcus, corynebacterium, aerobic and anaerobic gram, viruses containing single and double stranded dna. b) Budding This will help you to prepare for exams, contests, online tests, quizzes, viva-voce, interviews, and certifications. However, in a contemporary sense, we associate biotechnology with the direct alteration of an organism's genetics to achieve desirable traits through the process of genetic engineering. View Answer, 40. As primary screening allows the detection and isolation of microorganisms which posses, potentially interesting industrial applications.