c) magnetic fields 11. 13. c) Objective lens 5. C. Enrichment Culture technique [1] Often the first test performed, gram staining involves the use of crystal violet or methylene blue as the primary color. All microbes are harmful to humankind.a) Trueb) FalseAnswer: bClarification: Although microbes cause a large number of diseases in human beings, various animals and plants, but not all microbes are harmful. Which among the following is not an ammonia-oxidizing bacteria? 5. 3. B) 62.3oC for 30 minutes. D) all of the above. d) Lactobacillus acidophilus B. (1) It is useful in sorting microorganisms that have real commercial value. Some bacteria are capable of spore formation so they are highly heat resistant and some are capable of producing heat-resistant toxins. lauren conrad and stephen colletti /; 2. Which of the following are produced by microorganisms? C. Enrichment Culture technique 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. . It works best in this range and is also used as a tracking dye in Agarose-Gel Electrophoresis. 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. a) Condenser lens d) Phaeophycophyta Which of the following inhibits DNA replication? Microorganisms Class 8 Science Chapter 2 as per NCERT Book used in CBSE and other Schools. View Answer, 3. View Answer, 8. You can also check this one and can share your opinions on Cell Culture Plates Product. determined to obtain accurate susceptibility results. 1. Biotechnology, the practical application of microorganisms in making products for human use, is a relatively new science, begun since Pasteur's time. Answer: A a) changes in the total population The microorganisms are chosen based on the rest three criteria. Which of the following is a correct usage of binomial nomenclature? D. American Type Classifier and Collection. B) False, Hot foods must be maintained above 60 oC to inhibit microbial growth. Which of the following morphological characteristics is an important identification characteristic of. Lung infection was suspected, and a chest X-ray was performed which showed infection in both lungs. C. Enrichment Culture technique Aims and objectives. d) appendaged bacteria a) chemical compounds d) spherical d) Pour plate 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. 3. Answer: D c) Secondary treatment 13. A. Which of the following method is not used in isolation and screening of desired microorganisms? The act of phagocytizing pathogenic or foreign particles allows cells of the immune system to know what they are fighting against. b) hydrophilic barrier C. perfringens is a spore-forming bacteria, that produce H 2 S and hemolysis on blood agar. a) elongated D) prevent mold. a) Bacillariophycophyta A. (3) Attempt to synthesized secondary metabolites outside of their natural environment. b) Study of animals and their family d) Photosynthetic sulfur bacteria c) Psychrophile d) Nitrosovibrio tenuis View Answer, 4. 2. It should not leave damage and odour. c) Enrichment Culture technique d) an increase in the mass of an individual organism 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. Chrysolaminarin is the reserved food of ___________________ It belongs to the phthalein family that is employed as an acid-base indicator. A. B) sulfites. 6. the virus must be able to cross-link red blood cells directly. 5. Performance and sterility testing of media lots should also be determined and b) Microbacteria consent of Rice University. is affected by the patient's food intake on the day of testing. B) mass, controlled culture of microbes to synthesize products. View Answer, 25. a) Algae All of the above. Clarification: The transfer of a 1ml solution to 9ml d/w is called as serial 10-fold dilution. D) starch. microscopic with a fried egg shape. d) 6.4 8.0 For which viral disease, vaccine has been recently developed through the use of tissue culture? b) Rhodospirillum View Answer, 33. 1. a) Small pox Which of the following statement is correct regarding primary screening________. d) gene Clean and disinfect surfaces that are touched often. Good work practices include, a. smelling and tasting chemicals . c) Study of organisms that are not visible to naked eyes View Answer, 46. Wash your hands with soap and water for at least 20 seconds. d) both aerobic and anaerobic cells Creative Commons Attribution License View Answer, 9. a) 1mm in diameter Secondary screening can give information about (1) The genetic instability in microbial cultures (2) Number of products produced in a single fermentation (3) The structure of the product (4) All of the above. 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 . First link in any food chain is usually green plants because. Vaccination was invented by ____________ A. View Answer, 40. Which of the following method is useful for the isolation and detection of organisms having the ability to produce growth factors? A 24 year old sexually active woman had an infection in the vaginal area with genital discharge while urinating. View Answer, 6. A 19-year-old male living in a tropical region of India visited the hospital. Clarification: Hanging drop technique is used for motility testing of bacteria. Place the gram of soil into the first tube with saline and SHAKE WELL. Microbiology is the study of living organisms that are not visible to the naked eyes. All Rights Reserved. Methyl red Diagram and name four mechanisms bacteria use to transport materials across the cytoplasmic membrane. Several microbes are useful to humans in diverse ways like in household products, industrial products, agricultural products, etc. A food chain comprising birds, green plants, fish and man. How do you isolate microorganisms in the air? b) Antibiotic producers d) Amino acid producers Respiratory pathogens: Includes common viruses and atypical bacteria 2: NP swab: Pathogens may have prolonged shedding time; positive results may not rule out infection from other pathogens. a) Leuconostoc mesenteroides 2. Now, 1ml of that stock solution is taken and transferred to the 2nd test tube containing 9ml of distilled water. Has three to five flagella at the posterior end B. Primary Screening of Microorganisms: Primary screening may be defined as detection and isolation of the desired microorganism based on its qualitative ability to produce the desired product like antibiotic or amino acid or an enzyme etc. (1) Microbial isolation technique is an attempt to grow microorganisms outside of their natural environment. d) Indicator dye technique In the following diagram, what does the question mark represent?a) Ciliab) Flagellac) Haird) PseudopodiaAnswer: b 5. a) Gram-negative organisms d) cathode rays Who was the first to observe animalcules under the microscope? Answer: B chp 25 microbiology 211 mcq. 2011-2023 Sanfoundry. c) Nitrosomonas europaea View Answer, 3. The screening is isolation and detection of microorganisms of interest. d) Lophotrichous Universal aseptic techniques includes, Except a) Gown b) Mask c) Cough Etiquettes d) Hand washing answer-D 4. Which of the following is a prokaryotic microorganism? A. This quiz is designed to help you assess how well you have learned the content of this lesson. d) Indicator dye technique Answer: C b) mutualistic The serial dilutions of soil are performed and spread on a Petri plate and allowed to grow. The microbes play a major role in nutrient cycling, decomposition, food spoilage, control and cause of diseases and biotechnology. False. A) True Which among the following is a pathogenic algae for humans? a) Cephaleuros c) parasitic infection We recommend using a Besides macroscopic plants and animals, microbes are the major components of biological systems on this earth. Fermentation Products & Bioreactor Design, Fermentation Laboratory & Bioprocesses Design, SCADA System for Bioreactors, Beer & Brewing, Fermenting Vegetables & Sour Tonic Beverages, here is complete set of 1000+ Multiple Choice Questions and Answers, Prev - Fermentation Technology Questions and Answers Microbial Growth Kinetics FedBatch Culture, Next - Fermentation Technology Questions and Answers Preservation of Industrial Microorganisms, Certificate of Merit in Fermentation Technology, Fermentation Technology Certification Contest, Genetic Engineering Questions and Answers Database Screening and Screening by Nucleic Acid Hybridisation 1, Fermentation Technology Questions and Answers Improvement of Industrial Microorganisms, Fermentation Technology Questions and Answers Fermentation Products Recovery and Purification Chromatography, Genetic Engineering Questions and Answers Database Screening and Screening by Nucleic Acid Hybridisation 2, Mechanical Operations Questions and Answers Screening Equipments, Fermentation Technology Questions and Answers Microbial Growth Kinetics FedBatch Culture, Fermentation Technology Questions and Answers Aeration and Agitation Determination of Kla Values, Fermentation Technology Questions and Answers Microbial Growth Kinetics Continuous Culture, Fermentation Technology Questions and Answers Commercial Applications Surface, Submerged and Solid State Fermentation, Books on Engineering, Science and Technology, Chemical Process Technology MCQ Questions. 8. 3. d) Coliforms c) neither aerobic and anaerobic cells 4.1: Prokaryote Habitats, Relationships, and Microbiomes. A) fermentation, downstream processing, removal of waste, inoculation. View Answer, 29. Indeed, until Anton von Leeuwenhoek invented . b) The organism must be able to produce a high yield of product Due to the climatic and geographical diversity of Nepal, a wide range of microorganisms with potent source of antimicrobials are available. 4. Glycosylated hemoglobin: causes sickle cell anemia. Crowded plate technique a. a) Thiobacillus thiooxidans Which of the following types of microorganisms is photosynthetic? 9. Who is considered the father of Western medicine? a) Crowded plate technique 11 junio, 2022. C. Enrichment Culture technique It will immensely help anyone trying to crack an exam or an interview. Pathogen testing is used to identify pathogenic organisms in manufacturing environments, ingredients or finished products that could harm the consumer. Which of the following is NOT a criterion for the choice of an organism? 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. 4. B. b) The organism must be able to produce a high yield of product. The section contains MCQs on spirochetes, negative rods, cocci, facultatively anaerobic gram, rickettsias and chlamydias, mycoplasmas, positive cocci and positive bacteria. D. Indicator dye technique. c) AIDS 7. View Answer, 11. View Answer, 6. A sputum sample was taken for the lab diagnosis for the isolation and identification of the microorganism. d) Multiple fission Which among the following are Spirochetes? 4. a) Crowded plate technique 2. 14. 38) All of the following statements are correct about the most common bacteriological media called sheep blood agar that is used in the microbiology laboratory, b) Used for the culture of common fastidious bacteria, c) It is used for the culture of hemolytic bacteria. d) Pasteur 1. Which one of the following is called as the 'brewers yeast'. 8.0 10.0 Which of the following is not microbe?a) Bacteriab) Protozoac) Viroidsd) WormsAnswer: dClarification: Microbes are diverse in nature and include- protozoa, bacteria, fungi and microscopic animal and plant viruses, viroids and also prions that are proteinaceous infectious agents. The section contains questions and answers on light microscope, microbial Stains, transmission and scanning electron microscope. Q. Bacterial endospores are more resistant to antimicrobial control methods than all other microbial forms. b) below 1 percent Which of the following method can be used to determine the number of bacteria quantitatively? MCQ.9):Which bacteria have flagella of amphitrichous type means the flagellum are present at both the sides? b) Auxanographic technique 6. For e.g., cellulose producers grow on nutrient medium supplied with cellulose. b) Atrichous bacteria. answer choices. Salting, as a preservative, Place 6 test tubes into a rack and fill each with 9ml of 0.9% NaCl solution. d) Mycoplasmas d) The organism must be able to grow in an easily available nutrient medium Which of the following method is not used in isolation and screening of desired microorganisms? During their metabolism, microbes produce chemicals, some of which are used by human beings. It is 50,000X magnified image of a bacterium. View Answer, 2. 6. Which of the following shows the zone of inhibition when a particular organism is grown on a Petri plate? a) phospholipids c) Desulfotomaculum sp. What is Microbiology? d) Measles Actinomycetes are Gram-positive, facultative anaerobic fungus-like filamentous bacteria which remain on the top of the natural antibiotic producers. It doesn't include viruses and prions because they are classified as non-living. b) Mesophile and psychrophile Which of the following plate is used to detect and isolate organic acid producers? Multiple Choice. 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, Microbiology MCQ: The 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Which of the following is the source of Vitamin A. Which of the following is the standard resource for identifying bacteria? In which of the following treatment involve oxidation of organic constituents of the wastewater? Clarification: Phenol Red plate is used to detect and isolate organic acid producers. These extracellular enzymes break up the giant molecules of the substrate into smaller ones that can feed the microorganisms. 6. 8. d) Antoni van Leeuwenhoek 4. C) 72 oC for 15 seconds. c) The optimum temperature for the growth of an organism must be above 50C. A. c) Streptococci. Complex media are prepared using digests of microbial, animal, or . Which among the following group of microorganisms are found in the ducts of cows mammary glands? About Oracle NetSuite. 3. Home Class 12 Biology Objective Questions 250+ TOP MCQs on Microbes and Answers. this would be absolutely amazing. The section contains multiple choice questions and answers on normal flora, human host, normal flora distribution, microbial adherence, epithelial cell layers penetration and microbial virulence factors. Report an issue. These are non-enveloped viruses with a double-stranded DNA genome. Microscopic examination and culture of the sputum sample revealed gram-positive cocci that appear in chains. Some examples of rod-shaped bacteria include Lactobacillus, Morganella, Bacillus anthracis, Klebsiella pneumoniae. d) Indicator dye technique b) True

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