These extracellular enzymes break up the giant molecules of the substrate into smaller ones that can feed the microorganisms. This reduces the cooling costs in large scale fermenters. The well-isolated colonies are antibiotic producers with the zone of inhibition. c) ribitol or glycerol residues Which of the following method is useful for detection and isolation of those microorganisms which are capable of growing on a particular nutrient medium? (2) Attempt to kill microorganisms outside of their natural environment. View Answer, 31. a) Styloviridae B) False, Hot foods must be maintained above 60 oC to inhibit microbial growth. 10. The Society's role is to help unlock and harness . B) using small scale containers to concentrate production. The process is repeated several times until the requirement is met. Glycolysis can occur in ___________ c) Phenolphthalein 43) Which of the following methods are the most common and routine culture methods performed in the microbiology lab for the proper isolation and identification of bacteria and fungi? 9. Therefore, the exact composition of a defined medium is known. 6. a) glycerol residues Tyrocidines are more effective against ___________________ d) Lophotrichous It should have a fast rate of kill of micro-organisms. 7. B. 10. Besides macroscopic plants and animals, microbes are the major components of biological systems on this earth. It gets its name from the Danish bacteriologist Hans Christian Gram who first introduced it in 1882, mainly to identify organisms causing pneumonia. C) sugar. The section contains multiple choice questions and answers on bioenergetics principles, energy production by photosynthesis, anaerobic and aerobic processes. c) Breads 4. Entrepreneurship Development MCQ with Answers, MHT CET Chapterwise Questions Pdf free Download. 8. c) 2mm in diameter Antibiotic producers You may refer to the lesson text whenever you are unsure of the answer. 40) Biochemical tests are a common and conventional laboratory procedure in the differentiation and identification of enteric bacteria. c) Spirillum volutans Clarification: ATCC stands for American Type Culture Collection. Which of the following is the source of Vitamin A. A) are among the most widely used preservatives. View Answer, 50. It is the zone where only the growth of a particular colony is observed whereas rest all colonies get degraded by antibiotics. d) Coliforms View Answer, 15. 1. 15. Your health care provider will insert a special tool called a speculum into your vagina. The microorganisms from lakes and rivers can grow at a salt concentration of _________ View Answer, 44. 1. c) Enrichment Culture technique Which of the following plate is used to detect and isolate organic acid producers? 3. A routine GTT: is three hours long. A 70 year old male visited a clinic with chronic cough, chest pain, fever, chills, and weakness. B. Auxanographic technique 26. Your email address will not be published. 2011-2023 Sanfoundry. Which of the following is used in electron microscope? a) 100-fold It doesn't include viruses and prions because they are classified as non-living. Q. Vegetative bacteria are able to withstand adverse conditions better than protozoan cysts. Most E. coli bacteria are harmless and are found in great quantities in the intestines of people and warm-blooded animals. c) chitin Prokaryotes can be found everywhere on our planet, even in the most extreme environments. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution License . Phagocytosis is a critical part of the immune system. 5. Crowded plate technique Mycobacteria f"u001e MCQs IN MICROBIOLOGY 13. pH required for the growth of bacteria is 22. 100-fold This includes bacteria, archaea, viruses, fungi, prions, protozoa and algae, collectively known as 'microbes'. d) Hanging Drop technique C lostridium perfringens is an obligate anaerobic bacteria that do not require oxygen to grow and thus it is not Microaerophilic, microaerophilic bacteria require low amounts of oxygen for growth. 3. A. What is the fecal test that requires a 3-day specimen? Which of the following is the standard resource for identifying bacteria? D. Indicator dye technique. A) True The serial dilutions of soil are performed and spread on a Petri plate and allowed to grow. Mycoplasma pneumoniae is an unusual bacteria with distinctive colonies which are. Secondary screening may be qualitative and quantitative in its approach. 9. 11. d) Coliform bacteria. b) Antibiotic producers 3. Who was the first to observe "animalcules" under the microscope? Some strains, however, can cause illness. The reason they are called microorganisms is that you can only see them when you use a microscope. A) True This is one of the widely used methods and more important. B. Auxanographic technique Microbial enzyme production concentrates on simple hydrolytic enzymes (proteases, amylases, pectinases) that degrade natural polymers such as proteins, starches, or pectin. The section contains MCQs on microorganisms, industry, industrial uses of bacteria, molds and yeasts, genotypic changes, bacterial recombination and conjugation, bacterial transduction and transformation. (4) This may be accomplished by paper, thin layer, chromatographic technique. Which of the following plate is used to detect and isolate organic acid producers? Staphylococcus aureus is a major bacterial human pathogen that causes a wide variety of clinical manifestations. They are present even at sites where no other life-form could possibly exist- sites such as deep inside geysers, deep in the soil, etc. These particles may consist of a single, unattached organism or may occur in the form of clumps composed of a number of . Which of the following types of mutants can be isolated using the replica plate technique? Answer: B a) Leuconostoc mesenteroides d) Mycoplasmas b) transposons A microorganism is a living thing that is too small to be seen with the naked eye. View Answer, 30. b) Streak-plate Industrial microbiologists use "tricks" to increase the amount of chosen end product; this may include For this dilution, it may be said that the solution was diluted _______ C) selecting microbial strains that lack a feedback system. a) Shortest wavelength of visible light used Place 6 test tubes into a rack and fill each with 9ml of 0.9% NaCl solution. View Answer, 2. Our Environment Class 10 MCQ Question 6. a) Gram-negative organisms View Answer, 33. Our members have a unique depth and breadth of knowledge about the discipline. A) True A. screening of microorganisms includes mcqwarning signs for a deteriorating patient with covid 19 infection 2022.07.03 18:36 18:36 What is the average size of a microbe?a) Less than 1 mmb) More than 1 cmc) Less than 0.1 mmd) More than 0.1 mmAnswer: cClarification: Microbes are microorganisms which have a size less than 0.1 mm. Trophic level in an ecosystem represents. Which of the following method proceeds with 2-plate preparation? b) hexokinase Blood C. Electrolytes D. Water: 5. a) Study of molecules that are visible to human eyes A. A. Now, 1ml of that stock solution is taken and transferred to the 2nd test tube containing 9ml of distilled water. Protozoa that eat other organisms are known as _______________ OpenStax is part of Rice University, which is a 501(c)(3) nonprofit. a) Thiobacillus thiooxidans b) mutualistic Measles is a disease caused by a virus, it is spread via respiratory droplets. View Answer, 27. Which of the following method proceeds with 2-plate preparation? b) cellulose D. Indicator dye technique. The section contains multiple choice questions and answers on soil microorganisms interactions, nitrogen, carbon and sulphur cycles, aquatic environment, aquatic microorganisms techniques and productivity. 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. Prokaryotes are very flexible metabolically, so they are able to adjust their feeding to the available natural resources. Microorganism Definition. Identification of bacteria by biochemical tests. C) is used to prevent growth of halophiles. C. Enrichment Culture technique a) The organism must be genetically stable d) Lactobacillus acidophilus 5. a) Edwin John Butler includes 6 urine samples. 14. Which of the following statement is correct regarding primary screening________. 1g of soil is added to that test tube and the soil is allowed to settle down. a) Streptomyces sp. ticks and fleas. 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. c) hydrophobic barrier 25. a)Microaerophilic. a) x-rays 1. All of the above. It is done by using paper, thin layer or other chromatographic techniques. d) mitochondrial membrane Which of the following is a type of fungal microorganism? Answer: B a) Phenol red plate B) False, Yeast cells prefer aerobic conditions to multiply in number. a) Crowded plate technique Often overlooked, hand-washing is one of the easiest and most effective ways to protect yourself from germs and most infections. 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Defined media are prepared by adding precise amounts of highly purified inorganic or organic chemicals to distilled water. Answer: B Which of the following are important primary screening techniques? Symptoms include cough and lung infection. 5. Gram negative bacteria take the color of safranin stain and appear pink or red. The section contains MCQs on selective methods, pure cultures and cultural characteristics. B. b) RNA polymerase Which among the following are Spirochetes? Avoid contaminated food and water. Clarification: The Crowded Plate Technique is used for the detection and isolation of the organisms which are antibiotic producers. Home Class 12 Biology Objective Questions 250+ TOP MCQs on Microbes and Answers. Which of the following foods is NOT made by fermentation? a) viral infection Crowded plate technique Plasmodium divides by which of the following method most commonly? B) False, Freezing at below -20 oC will kill most pathogenic food bacteria and inactivate toxins. It is colourless at pH 8.0 and becomes red at pH above 10.0. 6. In regions of the estuary that are nutritionally poor, it is more likely to find which of the following organisms? (1) It is useful in sorting microorganisms that have real commercial value. Except where otherwise noted, textbooks on this site Secondary screening may be qualitative and quantitative in its approach. d) Nitrosovibrio tenuis A. Butanol is obtained by fermenting molasses by. 3. Due to the climatic and geographical diversity of Nepal, a wide range of microorganisms with potent source of antimicrobials are available. Which isolation technique is most effective? The section contains MCQs on diseases caused by fungi and protozoa, therapeutic drugs for fungal treatment and protozoan diseases. Secondary screening helps in detecting really useful microorganisms in fermentation processes, which includes a) Neisseria gonorrhoeae. B) heat. 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. Which of the following are true for cytoplasmic membrane? Children are more susceptible to this disease. D. American Type Classifier and Collection. 3. milk, meat, green vegetables, fruits, etc.) A) True Several microbes are useful to humans in diverse ways like in household products, industrial products, agricultural products, etc. a) True View Answer, 9. This quiz is designed to help you assess how well you have learned the content of this lesson. 6. d) both aerobic and anaerobic cells b) Thymol blue d) The organism must be able to grow in an easily available nutrient medium a) S mallpox d) Multiple fission then you must include on every physical page the following attribution: If you are redistributing all or part of this book in a digital format, a) above 1 percent If you are redistributing all or part of this book in a print format, Which of the following method is not used in isolation and screening of desired microorganisms? a) Algae View Answer, 17. (Or show it to your microbiology professor, just for fun.) Contact Us. View Answer, 22. 2. The prototrophs are the organisms which are not capable of synthesizing all growth requirements for themselves. b) The organism must be able to produce a high yield of product. True. (2) It determines which microorganisms can produce a compound. b) vitamins Clarification: The Enrichment culture technique is useful for the detection and isolation of those microorganisms which are capable of growing on a particular nutrient medium. Which shape of bacteria has been shown in the following diagram?a) Rod-shapedb) Comma shapedc) Spiral shapedd) Spherical shapedAnswer: dClarification: The following diagram represents spherical shaped bacteria, magnified 1500X. 13. 4. The prototrophs are the organisms which are not capable of synthesizing all growth requirements for themselves. Most Asked Technical Basic CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical | Medical MBBS Jobs Online Quiz Tests for Freshers Experienced . b) Auxanographic technique c) Secondary treatment 3. d) All of the mentioned False. A 24 year old sexually active woman had an infection in the vaginal area with genital discharge while urinating. D) are harvested during the exponential phase of growth. A test tube contains 9ml distilled water. The following diagram shows an adenovirus: ---- >> Below are the Related Posts of Above Questions :::------>>[MOST IMPORTANT]<, Your email address will not be published. 12. c) An objective with minimum numerical aperture B) sulfites. [2] The term for organisms that retain the . a) Growth Factor producers 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. 2011-2023 Sanfoundry. c) Chlorella Answer: A a) Amphitrichous View Answer, 13. Chapter 2: Classification of Medically important Bacteria MCQs. Which shape of bacteria has been represented in the following diagram? a) The organism must be genetically stable. Which of the following inhibits DNA replication? Thank you so much for sharing. The Gram staining is one of the most crucial staining techniques in microbiology. View Answer, 35. B. d) spherical 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. a) Eremothecium ashbyi B) False, Pasteurization is used to sterilize milk. However, if environmental contamination can enter the system, pathogens could get in too. d) hydrophobic barrier and site of generation of protonmotive force b) Advanced treatment YB STUDY is an Indias largest Online learning website offers learning for classes 1 to 12 and competitive exams like NEET, JEE, Olympiads, NTSE, KVPY, State boards etc. c) Enrichment Culture technique c) Objective lens 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. Antibiotic producing microorganisms can be detected by the method__________, 5. Which of the following was NOT a kingdom in Linnaeuss taxonomy? determined to obtain accurate susceptibility results. 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. (retrieve https://www.learningsta.com, April 2021) 2.0 SCREENING . MCQ Questions for Class 8 Science: Ch 2 Microorganisms: Friend and Foe. C. MacConkeys Agar plate . b) 8.0 10.0 d) Gram-positive bacteria 10. d) Corynebacterium diphtheriae A skin biopsy test was performed and the infection was diagnosed to be a parasitic infection. The OpenStax name, OpenStax logo, OpenStax book covers, OpenStax CNX name, and OpenStax CNX logo a. (adsbygoogle = window.adsbygoogle || []).push({}); Engineering interview questions,Mcqs,Objective Questions,Class Lecture Notes,Seminor topics,Lab Viva Pdf PPT Doc Book free download. Which of the following method is not used in isolation and screening of desired microorganisms? Phosphorus is essential component of __________ b) 0.5 to 1.0 micrometer in diameter b) The examination of the infection sites, c) They are prokaryotes in cellular organization. d) Thermophile A) True 10. d) bacterial infection is affected by the patient's food intake on the day of testing. a) cytoplasmic membrane