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Creative Commons Attribution License Microbiology is the study of : 3. 14. c) Streptococci. Defined media and complex media are two broad classes of culture media used in microbiology. 8. d) Multiple fission View Answer, 48. then you must include on every digital page view the following attribution: Use the information below to generate a citation. 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 is the secondary stage? A) True It is done by using paper, thin layer or other chromatographic techniques. View Answer, 40. Report an issue. (3) Attempt to synthesized secondary metabolites outside of their natural environment. MCQ Questions for Class 8 Science: Ch 2 Microorganisms: Friend and Foe. c) Desulfotomaculum sp. 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. Which of the following statement is correct regarding primary screening________. C. Enrichment Culture technique Lung infection was suspected, and a chest X-ray was performed which showed infection in both lungs. A) True What is required for proper isolation of microorganisms? Which of the following inhibits DNA replication? Answer: A. 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. b) Auxanographic technique View Answer, 16. a) Nitrospina gracilis D. Indicator dye technique. c) The optimum temperature for the growth of an organism must be above 50C C) new batches of microorganisms are screened for increased yield. The section contains questions and answers on light microscope, microbial Stains, transmission and scanning electron microscope. View Answer, 10. d) Primary treatment c) Spirochetes c) ribitol or glycerol residues a) Crowded plate technique C) is used to prevent growth of halophiles. c) hydrophobic barrier Microbial enzyme production concentrates on simple hydrolytic enzymes (proteases, amylases, pectinases) that degrade natural polymers such as proteins, starches, or pectin. View Answer, 3. 2. consent of Rice University. Through primary screening only few or many microorganism that produce a industrially . Performance and sterility testing of media lots should also be determined and 7. 30 seconds. Full-form of ATCC is _________. a) Lactobacillus Which of the following types of microorganisms is photosynthetic? Which of the following was NOT a kingdom in Linnaeuss taxonomy? b) Jenner 1. D) prevent mold. a) 100-fold d) Antoni van Leeuwenhoek View Answer, 9. A. Nitrates maintain the red color of preserved meats and a) Crowded plate technique B. Auxanographic technique 3. B) nutrients are continuously fed into the reactor and the product is siphoned off during the run. A. Gram negative bacteria take the color of safranin stain and appear pink or red. a) Spread-plate 4. Who proposed that swamps might harbor tiny, disease-causing animals too small to see? 12. b) RNA polymerase _______ are the agents that act as carriers of a pathogen and spread diseases. 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. b) light waves For e.g., cellulose producers grow on nutrient medium supplied with cellulose. d) Pasteur d) spherical You can practice these MCQs chapter by chapter starting from the 1st chapter or you can jump to any chapter of your choice. Full-form of ATCC is _________ 15. View Answer, 5. Which of the following method is useful for detection and isolation of those microorganisms which are capable of growing on a particular nutrient medium? d) an increase in the mass of an individual organism Which among the following group of microorganisms are found in the ducts of cows mammary glands? A) heat below 100 oC. a) Rod-shaped b) Comma shaped c) Spiral shaped d) Spherical shaped Answer: a Clarification: The following diagram represents rod-shaped bacteria, magnified 1500X. The section contains MCQs on microorganisms, industry, industrial uses of bacteria, molds and yeasts, genotypic changes, bacterial recombination and conjugation, bacterial transduction and transformation. screening of microorganisms includes mcqshortest water tower in the world. Now, 1ml of that stock solution is taken and transferred to the 2nd test tube containing 9ml of distilled water. Actinomycetes are Gram-positive, facultative anaerobic fungus-like filamentous bacteria which remain on the top of the natural antibiotic producers. In the following diagram, what does the question mark represent?a) Ciliab) Flagellac) Haird) PseudopodiaAnswer: b Which of the following method can be used to determine the number of bacteria quantitatively? D. The organism must be able to grow in an easily available nutrient medium. a) Methyl red d) Indicator dye technique 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. B) False, Hot foods must be maintained above 60 oC to inhibit microbial growth. Which isolation technique is most commonly used for colony isolation in the laboratory? A) True 1. Crowded plate technique a) DNA polymerase III A. A) manipulating the growth environment. C. American Type Counter Collection c) Secondary treatment 6. Clarification: The question mark in the following figure represents flagella of a rod-shaped bacterium. 6. Which of the following pulmonary pathogens cannot be easily detected by the gram staining technique when performing a microscopy test? Clarification: The pH range of Bromophenol blue is 3.0 4.6. What is required for proper isolation of microorganisms? The reason they are called microorganisms is that you can only see them when you use a microscope. screening of microorganisms includes mcq; screening of microorganisms includes mcq. Mycoplasma pneumoniae is an unusual bacteria which has distinctive characteristics, such as. The 1st plate is used to isolate and detect prototrophs whereas 2nd plate is used for identification of auxotrophs. Which among the following are Spirochetes? View Answer, 24. How do you isolate microorganisms from the soil? 10. d) Fungi 8. Chemical preservatives do NOT include d) Physical assay . b) False What does a viral DNA becomes after being associated with the bacterial chromosome? b) Advanced treatment Some examples of rod-shaped bacteria include Lactobacillus, Morganella, Bacillus anthracis, Klebsiella pneumoniae. d) Lophotrichous The section contains MCQs on selective methods, pure cultures and cultural characteristics. b) Biological assay These extracellular enzymes break up the giant molecules of the substrate into smaller ones that can feed the microorganisms. Which of the following metabolic characteristic is a distinguishing characteristic and identification of colonies of. [1] Often the first test performed, gram staining involves the use of crystal violet or methylene blue as the primary color. B. Our 1000+ MCQs focus on all topics of the Microbiology subject, covering 100+ topics. B) False, Yeast cells prefer aerobic conditions to multiply in number. a) Shortest wavelength of visible light used chipotle corporate phone number . b) Microbacteria 10. a) Gram-negative organisms a) changes in the total population View Answer, 13. c) The optimum temperature for the growth of an organism must be above 50C. It should be active and stable and environmentally safe. b) Rabies Which of the following method is used for the isolation of mutants? The microbes play a major role in nutrient cycling, decomposition, food spoilage, control and cause of diseases and biotechnology. Rickettsia species are carried by. Crowded plate technique A sputum sample was taken for the lab diagnosis for the isolation and identification of the microorganism. 10. C. MacConkeys Agar plate Microscopic examination and culture of the sputum sample revealed gram-positive cocci that appear in chains. 11. c) Enrichment Culture technique Antibiotic producers A. Phenol red plate 9. (1) Microbial isolation technique is an attempt to grow microorganisms outside of their natural environment. 11 junio, 2022. D. Amino acid producers. B) sulfites. a) Phenol red plate Which of the following media is used for screening amylase? b. not washing hands before and after lab . a) Growth Factor producers 2. Clarification: Phenolphthalein has a pH range between 8.0 10.0. All of the above. 5. 3. D. Indicator dye technique. a) Alcoholic beverages b) Auxanographic technique d) Nitrosovibrio tenuis These microorganisms have been often under-appreciated and under-studied. Which of the following is NOT a criterion for the choice of an organism? Q.1. The bacterial cell then elongates and splits into two daughter cells each with identical DNA to the parent cell. The "flash method" or "high temperature short time" method exposes fluids to requires five blood samples . View Answer, 42. Which of the following is not a subfield of microbiology? 2. other viruses are too dangerous to work with in a clinical lab setting. View Answer, 6. c) carbohydrates 7. A) True Done in one or few steps. The normal composition of feces includes all of the following except: A. Bacteria B. Glycosylated hemoglobin: causes sickle cell anemia. 7. A) substrates are added to the system all at once and runs until product is harvested. Gram positive bacterial cell wall takes the stain of crystal violet and appears, BIOCHEMISTRY, BIOMEDICINE & PHARMACEUTICS, Classification and identification of microorganisms, Branched Chain Amino Acid Metabolism and Maple Syrup Urine Disease, drugs for the treatment of cardiovascular diseases, MEDICAL MICROBIOLOGY gastrointestinal tract, Nosocomial infection/ hospital acquired infections, Lipid Metabolism: MCQs (Cholesterol, Triglycerides, and Other Lipids), MCQs on Sterilization and Disinfection - Decontamination, aseptic processes in laboratory and hospitals, Carbohydrate Metabolism: MCQ on Glycolysis & Gluconeogenesis. The common symptoms are pink or red spots on the skin surface, dry cough, and runny nose. View Answer, 28. Which of the following statements is correct regarding secondary screening________. Sulphur can be utilized by bacteria in the a. B) using small scale containers to concentrate production. 31) Name the bacteria of the Enterobacteriaceae family that have the following characteristics? d) cathode rays Which of the following method is not used in isolation and screening of desired microorganisms? 2. d) Measles D. Indicator dye technique. Therefore, the exact composition of a defined medium is known. Which of the following is not related to microbes?a) Microbes are not ideal for biotechnologyb) Microbes produce chemicals during their metabolismc) Microbes can be grown on artificial mediumd) Microbes can live in highly acidic mediumAnswer: aClarification: Microbes can be grown on artificial cultures media where they form colonies. A. Fecal occult blood B. ticks and fleas. This is one of the widely used methods and more important. b) Atrichous bacteria. c) American Type Counter Collection 4. Air Sampling. Several microbes are useful to humans in diverse ways like in household products, industrial products, agricultural products, etc. The prototrophs are the organisms which are not capable of synthesizing all growth requirements for themselves. View Answer, 13. Clarification: The Crowded Plate Technique is used for the detection and isolation of the organisms which are antibiotic producers. d) Pour plate View Answer, 18. 3. microscopic with a fried egg shape. View Answer, 6. (2) It determines which microorganisms can produce a compound. Screens are made of long, closely spaced, narrow metal bars. Acridine orange is which type of mutagen? a) True On the second day, the symptoms got worse and she was taken to the hospital. Answer: B Cryptococcosis is a disease of ________________ 7. Besides macroscopic plants and animals, microbes are the major components of biological systems on this earth. 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. membranes of microorganisms. 9. Answer: A Best method of sterilization at commercial level is a) Hot air oven b) Autoclaving c) Radiation d) Sun light answer-C 5. Answer: 1. d) Mycoplasmas A food chain comprising birds, green plants, fish and man. answer choices. a. The section contains MCQs on chemotherapy historical highlights, antibiotics and their actions, microbiological assay of antibiotics, antifungal, antiviral and antitumour antibiotics. Avoid contaminated food and water. B) are by-products of metabolism that are not important to microbe function. The microorganisms from lakes and rivers can grow at a salt concentration of _________ It is colourless at pH 8.0 and becomes red at pH above 10.0. 7. Question 6. The methods for isolation and screening are a crowded plate, auxanography, enrichment culture and use of indicator dyes. Pathogen testing is used to identify pathogenic organisms in manufacturing environments, ingredients or finished products that could harm the consumer. c) DNA polymerase I Often overlooked, hand-washing is one of the easiest and most effective ways to protect yourself from germs and most infections. 14. 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. Give the steps of typical sewage treatment plant are as given below. Which among the following is a pathogenic algae for humans? In regions of the estuary that are nutritionally poor, it is more likely to find which of the following organisms? Which of the following plate is used to detect and isolate organic acid producers? Except where otherwise noted, textbooks on this site The colour of plate changes from red to yellow in the zone of organisms producing organic acid. Answer: B Most E. coli bacteria are harmless and are found in great quantities in the intestines of people and warm-blooded animals. These are non-enveloped viruses with a double-stranded DNA genome. c) cytoplasm Entrepreneurship Development MCQ with Answers, MHT CET Chapterwise Questions Pdf free Download. b) 8.0 10.0 (1) Its a process for the detection and isolation of microorganisms of our interest. They block floating debris such as wood, rags, and other bulky objects that could clog pipes or pumps. 4. Which of the following microorganism has the cocci cell shapes and sizes arranged usually in tetrad structures? Which organisms show the zone of inhibition grown on a Petri plate? What is the approximate size of the bacterial cell? 4.0 SECONDARY SCREENING OF MICROORGANISMS . C. Enrichment Culture technique Universal aseptic techniques includes, Except a) Gown b) Mask c) Cough Etiquettes d) Hand washing answer-D 4. are not subject to the Creative Commons license and may not be reproduced without the prior and express written a) Streptomyces sp. Protozoa that eat other organisms are known as _______________ Some of the frequently asked exam questions are as follows:-. Microorganism Definition. 40) Biochemical tests are a common and conventional laboratory procedure in the differentiation and identification of enteric bacteria. b) below 1 percent 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 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Label these plates 1/10 3 through 1/10 6. (1) It is useful in sorting microorganisms that have real commercial value. 26. The section contains questions and answers on energy utilization in biosynthetic and nonbiosynthetic processes, transcription and translation of genetic information and protein synthesis process. Blood C. Electrolytes D. Water: 5. A) radiation. Clarification: The Auxanographic technique is used for the detection and isolation of the organisms which are growth factor producers. What is Microbiology? lauren conrad and stephen colletti /; 2. MCQ.8): In which of the following bacterial condition, fimbriae helps the bacteria to stick to the mucous membrane of the host? View Answer, 49. 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. b) an increase in number of cells A test tube contains 9ml distilled water. Methyl red c) Lactobacilli A. B. 4. Cellulose is degraded to cellobiose by the enzyme __________________ Secondary screening may be qualitative and quantitative in its approach. A. The prototrophs are the organisms which are not capable of synthesizing all growth requirements for themselves. Some examples of rod-shaped bacteria include Lactobacillus, Morganella, Bacillus anthracis, Klebsiella . a) Regeneration Place 6 test tubes into a rack and fill each with 9ml of 0.9% NaCl solution. Vaccination was invented by ____________ b) coliforms b) Potato Dextrose Agar plate About Oracle NetSuite. D) A and C . the virus must not be able to lyse red blood cells. a) Edwin John Butler 2. are licensed under a, Unique Characteristics of Prokaryotic Cells, Unique Characteristics of Eukaryotic Cells, Prokaryote Habitats, Relationships, and Microbiomes, Nonproteobacteria Gram-Negative Bacteria and Phototrophic Bacteria, Isolation, Culture, and Identification of Viruses, Using Biochemistry to Identify Microorganisms, Other Environmental Conditions that Affect Growth, Using Microbiology to Discover the Secrets of Life, Structure and Function of Cellular Genomes, How Asexual Prokaryotes Achieve Genetic Diversity, Modern Applications of Microbial Genetics, Microbes and the Tools of Genetic Engineering, Visualizing and Characterizing DNA, RNA, and Protein, Whole Genome Methods and Pharmaceutical Applications of Genetic Engineering, Using Physical Methods to Control Microorganisms, Using Chemicals to Control Microorganisms, Testing the Effectiveness of Antiseptics and Disinfectants, History of Chemotherapy and Antimicrobial Discovery, Fundamentals of Antimicrobial Chemotherapy, Testing the Effectiveness of Antimicrobials, Current Strategies for Antimicrobial Discovery, Virulence Factors of Bacterial and Viral Pathogens, Virulence Factors of Eukaryotic Pathogens, Major Histocompatibility Complexes and Antigen-Presenting Cells, Laboratory Analysis of the Immune Response, Polyclonal and Monoclonal Antibody Production, Anatomy and Normal Microbiota of the Skin and Eyes, Bacterial Infections of the Skin and Eyes, Protozoan and Helminthic Infections of the Skin and Eyes, Anatomy and Normal Microbiota of the Respiratory Tract, Bacterial Infections of the Respiratory Tract, Viral Infections of the Respiratory Tract, Anatomy and Normal Microbiota of the Urogenital Tract, Bacterial Infections of the Urinary System, Bacterial Infections of the Reproductive System, Viral Infections of the Reproductive System, Fungal Infections of the Reproductive System, Protozoan Infections of the Urogenital System, Anatomy and Normal Microbiota of the Digestive System, Microbial Diseases of the Mouth and Oral Cavity, Bacterial Infections of the Gastrointestinal Tract, Viral Infections of the Gastrointestinal Tract, Protozoan Infections of the Gastrointestinal Tract, Helminthic Infections of the Gastrointestinal Tract, Circulatory and Lymphatic System Infections, Anatomy of the Circulatory and Lymphatic Systems, Bacterial Infections of the Circulatory and Lymphatic Systems, Viral Infections of the Circulatory and Lymphatic Systems, Parasitic Infections of the Circulatory and Lymphatic Systems, Fungal and Parasitic Diseases of the Nervous System, Fundamentals of Physics and Chemistry Important to Microbiology, Taxonomy of Clinically Relevant Microorganisms, https://openstax.org/books/microbiology/pages/1-introduction, https://openstax.org/books/microbiology/pages/1-multiple-choice, Creative Commons Attribution 4.0 International License.