which kind of sample gives positive result for Molish test?
Q: What gram-positive bacterium can give a positive presumptive test?
A: In microbiology, the presumptive test is used to find out the presence of gas-forming lactose…
Q: What is a mixed culture? A contaminated culture?
A: A microbiological culture, or microbial culture, is a technique for increasing microbial creatures…
Q: Match the test with the appropriate reagent/ chemical a. DNA test b. Paper chromatography c.…
A: Genetic material is nothing but the sequence of nucleic acids which is called as DNA. It contains…
Q: What is the purpose of the pour plate technique? If a pure culture is used to inoculate the plate,…
A: PURPOSE OF POUR PLATE TECHNIQUE The pour plate techniques can be used to determine the number of…
Q: Identify the method of sterilization/ chemical agent described At 15psi, the temperature reaches…
A: Given information: At 15psi, the temperature reaches 121 degree Celsius requiring only 15 to 20…
Q: Give two reasons for heating the slide after the smear is air dried?
A: Smear is the thin film of the sample that is spread over the slide to be observed in the microscope.…
Q: What would be the expected out come of a Nitrate reduction test If the bacteria is a pathogenic…
A: Nitrate Reduction Test is used to determine the ability of an organism to reduce nitrate (NO3) to…
Q: in the clinic, the acid-fast stain is used to diagnose infection with which bacterium?
A: The Ziehl-Neelson (ZN) stain is the most commonly utilized of the different types of AF staining…
Q: ç00 HN-CH-CH," CHR CHR A. В. D.
A: Biuret test is performed in order to detect the presence of peptide bonds.
Q: which bacteria is Coccobacillary,gram negative, non motile and negative oxidase test?
A: Bacteria are microscopic organisms which belong to prokaryote because these are unicellular…
Q: What is the media used in Catalase test and its expected results?
A: Catalase is an enzyme that is found in the cell in most of the organism that protect the cell from…
Q: Physical methods of sterilization include :
A: disclaimer: since you have posted multiple questions we have answered the first question for you. if…
Q: Why is there a need to use a staining agent in observing the specimen?
A: Staining agent: The things that owes-out stains were recognized as staining agent,…
Q: Given Test Reagent Positive or Negative Result Reason/Explanation Ribose Bial’s Orcinol Test…
A: Carbohydrates are a type of macronutrient found in certain foods and drinks. They include sugars,…
Q: Serial dilution is recommended prior to pour and spread plate. Why is this so?
A: Pour Plate: it is a technique in which A plate made by combining the inoculum which is cooled but…
Q: Does a positive presumptive test mean that the water is absolutely unsafe to drink?
A: In microbiology, the presumptive test is used to find out whether gas-forming lactose fermenters…
Q: Disinfectant Concentration Growth after time of exposure (minutes) Control 5 minutes 10 minutes…
A: * Disinfectant is a chemical substance that inactivates or to destroy the microorganisms that are…
Q: amylasw test test for? medium+ - reagents + Test/why?
A: Amylase is an enzyme produced by the salivary glands to digest carbohydrates. The amylase test is…
Q: What is the significance of heat fixing the smear?
A: Gram staining is a common laboratory technique in microbiology that is used to differentiate…
Q: What is the purpose for testing a specimen for hydrogen sulfide production?
A: Hydrogen sulfide is produced when a bacterial strain reduces the sulfur compounds. The specimens…
Q: What do to do when the disstillation did not make the sample completely pure? What could have went…
A: Distillation is a process that is based upon the boiling points of various liquids present in the…
Q: Gram staining techniques
A:
Q: What does the presence of gas in the Durham tubes for the presumptive test indicate?
A: Presumptive test : it is a test to identify bacteria from the large soil, water medium. It is known…
Q: What is a Urease test
A: Urease Test: A biochemical test that detects the alkaline fermentation of urine…
Q: hich of the different carbohydrate test would give a positive result for maltose? Describe the color…
A: Carbohydrates are the macromolecules that consist of carbon, hydrogen, and oxygen in the molecular…
Q: Does a positive presumptive test mean that the water is absolutely unsafe to drink? Explain
A: Water is tasteless, transparent, inorganic. Colorless, and odorless chemical substance. Its chemical…
Q: Explain why it is important to use only a small amount of bacteria when preparing a smear
A:
Q: Immediately after stirring 1 hour after stiring Original misture Suction filiration Figure 1 Figure…
A: Mixtures are defined as materials containing 2 or more chemical substances mixed together. In case…
Q: Why does the oxidase test must be performed from blood agar or another medium without a fermentable…
A: Biochemical tests are used to identify microbial diversity based on variations in the biochemical…
Q: What is the result of Staphylococcus epidermidis in the TSI agar test?
A: Bacteria are microorganism that most commonly occur in the soil, air, water and in adverse…
Q: What is the media used in Urease Test and expected results?
A: Urease test is defined as a biochemical test that distinguishes the basic alkaline fermentation of…
Q: Which test require a straight line inoculation? Choose all that apply
A: Answer: STRAIGHT LINE TECHNIQUE : It is the streaking technique of bacterial colony over the agar…
Q: n is 100x, what is the magnification of n is 40x, what is the magnification of t gnification is 10x,…
A: In light microscopy, there are several different types of microscopes, but the four most common are…
Q: Why is it necessary to perform a plate count in conjunction with the turbidimetry procedure?
A: Plate counting is one of the most fundamental techniques used in microbiology. It is used to…
Q: Application of neutralization test.
A: antigen-antibody reaction in which the certain effect of a bacterial exotoxin or a virus is blocked…
Q: Why is it necessary to make a skin puncture to a depth of 3mm?
A: Phlebotomy refers to the process of puncturing the vein with a cannula to collect blood. Blood…
Q: Why is 15 minutes generally used for sterilization? Why is agar added to medium?
A: Sterilization is the process in which all life forms like microbes (fungi, bacteria, viruses,…
Q: To measure the culture temperature, why is the thermometer placed in a tube separate from the…
A: A microbe or microorganism is a microscopic organism that is too small to be seen with the naked…
Q: Methyl red test does the color of the medium change to red when methyl red was added? Is it positive…
A: Biochemical method of bacterial identification is a classical method that is used for the…
Q: how to find out the test is differential or selective in the microbiology lab test?
A: Many kinds of medias are used in microbial study. Two types of media having similar inferred names…
Q: What microorganisms other than coliforms are likely to give positive presumptive test?
A:
Q: Why should the specimen be albumin free when performing the chloride test for urine?
A: Urine specimen should be free from albumin when performing the chloride test due to the following…
Q: sabuoraud slope culture contains a black mould. describe a diagnostic method you can use to identify…
A: Introduction:- SDA is essentially utilized for the particular development of yeasts, molds and…
Q: Is the ant test the same as the odor test in the physical examination of urine?
A: Kidneys are the main organs of the urinary system. The nitrogenous waste is usually excreted in the…
Q: Write down the materials, reagents, Principle, procedure and results for Ziehl-Neelsen stain
A: It is a differential staining technique which was first developed by Ziehl and later on modified by…
Q: Why should be avoided boiling more than 5 minutes in Barfoid test?
A: Barfoed test is carried out to detect the presence of monosaccharides in the sample. This test also…
Q: which tests involves deliberate contamination of an inanimate surface with a mircobial suspension?
A: According to the question, we have to explain the name of the test involves in deliberate…
Q: What method can be used to achieve sterilization?
A: It is required to describe the method to be used to achieve sterilization.
Q: Why did you perform the catalase test on colonies growing on nutrient agar plates but not on the…
A: Catalase test is used to identify the presence of catalase enzyme in the bacteria. Catalase is an…
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- Why is there a need to use acids and boil the sample in maceration?When using Endo agar as the selective and differential media for the confirmed test, how would you know whether the test is positive for the presence of coli?Does a positive presumptive test mean that the water is absolutely unsafe to drink?