If coliforms were present on a plated sample, would you know with certainty that the coliforms are disease-causing? Why or why not?

Q: A food sample with an unknown number of contaminating bacteria was serially diluted to 10-6. A…

A: Serial dilution of a food sample containing unknown quantity of contaminating bacteria was performed…

Q: i) Describe the proteins in terms of their size and abundance in the whey and deproteinated whey…

A: Whey can be defined as the liquid that remains after the curdling and the straining of the milk. It…

Q: Which of the alternatives below indicates techniques used both to purify and to concentrate…

A: Proteins are polymers of amino acids linked by peptide bond and it is one of the important…

Q: When hydrogen peroxide is placed on a colony of an unknown bacterium, bubbles form. Based on this…

A: Correct option is, (d) Is catalase-positive.

Q: If there is a sample having 3.5x10^5 CFU/ml, and this cell count came from a sample of the original…

A: CFU stands for colony-forming unit that gives rise to a particular colony. It is generally assumed…

Q: Why is water tested for coliform bacteria rather than for pathogenic bacteria which may be present?

A: Water quality testing plays a crucial role in safeguarding public health and ensuring the safety of…

Q: Why does the oxidase test have to be read quickly?

A: The Oxidase test is a biochemical test for the identification of bacteria. The test is mainly…

Q: The number of bacteria in a sample can also be quantified with other techniques, such as examination…

A: In microbiology laboratories the number of microorganisms present in a particular sample is…

Q: 1. A plate with a final dilution factor of 107 produced 210 colonies. a) What was the original…

A: Dilution is the process of diluting or mixing two or more substances or compounds; it is also known…

Q: If the concentration of E. coli in a broth is between 104 and 106 cells per mL, the best way…

A: E.coli are the type of bacteria that is known to cause many illness in humans. E.coli is cultured in…

Q: You found a bright blue growth on a tomato you had left on your kitchen counter. You’ve never seen a…

A: Introduction  A hypothesis is a proposed explanation for a phenomenon or observation that can be…

Q: Would a syringe filter with a pore size of 0.22 micrometers be able to completely remove all…

A: Answer :  A syringe filter with a pore size of 0.22 micrometers is able to completely remove all…

Q: What is the logic behind testing for E. coli to detect fecalcontamination of water?

A: Bacteria are unicellular prokaryotic organism that maintains a definite shape since it contains the…

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: The sediment observed in stained blood smear caused by: a) Overstraining b) More Haematoxylin in the…

A: Here we have to explain about why sediment observed in stained blood smear.

Q: Why was a blood agar, rather than a nutrient agar, plate used for the culture from your mouth?

A: Cultured bacteria are any bacteria that grow in the lab by the microbiologist using the required or…

Q: When bacteria from a throat swab are streaked on blood agar, why is the agar stabbed several times…

A: The initial identification of the streptococcal and enterococcal species is based on their hemolytic…

Q: The thermal death point is best described as:(a) The highest temperature that will support growth of…

A: BASIC INFORMATION  MICROBES  They are the unicellular organisms which can not seen by naked eyes…

Q: 1) What are all of the different colony types that can be seen on a mixed-culture streak plate?  2)…

A: Hi! Thanks for your question. As you have posted multiple questions, I am answering only the first…

Q: If a experiment took place with culture of Ecoli What happens to the ampicillin flask when added to…

A: We are answering 2 sub parts of first question For rest of the question Pls repost.

Q: How does the ONPG/MUG test allow a sample to be assayed simultaneously for the presence of both…

A: The ONPG/MUG (4-methyl-umbelliferyl-beta-D-glucose/O-nitrophenyl-beta-D-galactopyranoside) test is a…

Q: A bacterial organism is used to inoculate mannitol broth medium. Following incubation the broth is…

A: A nutrient growth medium is a type of solution or mixture that is designed to provide nutrients to…

Q: Why do we test water for coliforms if they are not considered pathogenic?

A: Introduction Coliforms are gram-negative, non-sporulating and motile or immotile bacteria. They…

Q: The use of sterile techniques and agar media enables microbiologists to study: a) Bacterial growth…

A: Agar is a polysaccharide composed of agarose and agaropectin. It is a gelatinous substance used in…

Q: Koch's postulates include all of the following EXCEPT O 1) Isolate the organism in pure culture. The…

A: Koch's postulates are a series of findings and experimental criteria suggested in the late 1800s by…

Q: Sample A: Sample B: Sample C: Sample D: Sample E: Sample F: 22mm 18mm 35mm 30mm 28mm 28mm 21mm 17mm…

A: Introduction The zone of inhibition is the area around an antibiotic pot where bacteria cannot grow.…

Q: You are working in a lab studying Streptococcus pyogenes as a cause of necrotizing fasciitiis.  You…

A: Streptococcus pyogenes as a cause of necrotizing fasciitiis.

Q: A scientist transfers 0.1 mL phage stock to a tube containing 9.9 mL tryptic soy broth. She then…

A: The total fold of dilution represents how much the original concentration has been reduced due to…

Q: n not more than 100 words, What antigens/strains are used for the Weil-Felix test, and from what…

A: Well Felix test is an agglutination test for the diagnosis of Rickettsia infection. The Well Felix…

Q: he following are the steps, listed in random order, for utilizing koch's postulates. what should be…

A: Koch's postulates were created in the nineteenth century as a set of basic instructions for…

Q: Each liter of an intranasal antibiotic solution contains 160 mg of gentamicin. You have 2-mL…

A: A number of gram-negative infections are treated with the aminoglycoside antibiotic gentamicin.…

Q: The UWC Biotechnolo class undertook a study to determine the microbiological quality of mince-meat…

A: In-order to calculate the amount of bacteria present in a highly  concentrated stock solution  ( a…

Q: feeding formulas

A: Tube feeding formula  is a formula that is designed for children or adults in order to provide…

Q: We have learned terms like 'sterile,' 'commensal,' 'contaminants,' 'germs,' 'microorganisms,' and…

A: The skin surface should be sterilised before puncturing it with injection to draw blood sample as it…

Q: not appropriate to self-diagnose outside of a medical context and this is a completely hypothetical…

A: Foot rash can occur as a result of an allergic reaction or infection. For example in athletes food…

Q: Is it likely that a pure culture could be isolated from the human body? Why or why not?

A: In microbiology the pure culture is a laboratory culture that contains a single species of organism.…

Q: Why is it critical to be able to determine the overall number of bacteria present in a food sample?

A: Hi, Thanks For Your Question.  Answer : Monitoring Of Total Bacterial Count Is Necessary, Because…

Q: If coliform bacteria are native to human colons, why the big concern over coliform contamination?

A: According to the question, we have to mention the solution of the question asked above i.e. If…

Q: Of the two principal polymers used in column chromatography and electrophoresis, which one would be…

A: Column chromatography is a purification method that uses the polarity of compounds for the…

Q: Note that it is not appropriate to self-diagnose outside of a medical context and this is a…

A: Introduction Bacteria are prokaryotic unicellular organisms. They are under the kingdom Monera.…

Q: Why are petri dishes ALWAYS stored and incubated upside down?   Question 17 options:   a)  helps…

A: ANSWER) Petri dish is a transparent dish which is shallow and is used with the purpose of holding…