Q: Why Do not add more than 2 drops of copper sulfate in Biuret reagent?
A: There are several biochemical tests to identify the presence of protein in a sample. There are tests…
Q: Why is it not safe to assume that two microorganisms with the same G + C content belong to the same…
A: The GC content helps in establishing the relatedness between species when there is a similarity in…
Q: How do the methyl-red and Voges-Proskauer tests differentiate between certain members of the…
A: Methyl-red and Voges-Proskauer tests are used to differentiate between certain members of the…
Q: Why safranin is used as the sample dye?
A: Safranin is utilized as a counterstain in some staining conventions, shading cell cores red. This is…
Q: When using CH4 as electron donor, why is Methylococcuscapsulatus an obligate aerobe?
A: Methylococcus capsulatus is an obligate aerobe that uses CH4 as a carbon source. It is a…
Q: Why is CFU more applicable to a culture of streptococcus than to a culture of E.coli
A: Streptococcus is a Gram-positive bacteria that are spherical in shape. This bacteria is responsible…
Q: What is the difference between Dry and Wet Celloidin Method?
A: Celloidin method is a histopathological technique of tissue impregnation and embedding that helps to…
Q: What are the common elements of puncture wounds, crush injuries,and compound fractures that…
A: Clostridium perfringens and a few other species of Clostridium cause necrotic tissue infections in…
Q: Why are ether-linked lipids in Thermodesulfobacterium unusual?
A: Bacteria are a group of prokaryotic microscopic single celled organisms. They live in diverse…
Q: Why do cells need to be kept in the freezing devices first then transferred to liquid nitrogen…
A: Rapid freezing of cells can cause ice crystals large crystals can be formed in which cells are…
Q: Why is hydrolysis of sucrose also known as specific sucrose test?
A: Hydrolysis is a chemical reaction where a molecule of water ruptures one or more chemical bonds. The…
Q: Why does the fermentation process produce solutions of only 10 - 15% ethanol?
A: Anaerobic respiration: -Also known as fermentation is the process where carbohydrates are broken…
Q: Does Escherichia coli provide positive or negative results for the lysine decarboxylase and…
A: Ornithine decarboxylase test detects whether bacteria uses ornithine amino acid for carbon source…
Q: Why is resazurin a useful media additive for the study of anaerobes?
A: Resazurin is a weakly fluorescent, non-toxic, redox-sensitive phenoxazine dye which has a…
Q: Why it is possible/ applicable to use recrystallization and vacuum filtration with Luminol? Cite…
A: Luminol is a chemical used in many laboratory experiments, like in biotech research lab, forensic…
Q: Cholera toxin as an A-B toxin. What does that tell you about its structure?
A: Cholera is referred to as an acute infection that is caused because of the bacterium known as Vibrio…
Q: Why Nitrogen (or Argon) Gas Is Used as a Wine Preservative?
A: Argon is a highly stable, tasteless, and odourless chemical element. Argon is two and half times…
Q: How is SO42- converted to SO32- during dissimilative sulfatereduction? Physiologically, how does…
A: It is a type of anaerobic respiration exhibited by some bacteria and archaea. The use of term…
Q: What metabolic process creates the rotten-egg smell characteristic of many anaerobic environments?
A: Hydrogen sulfide gas has the chemical formula H2S and possesses a characteristic rotten eggs smell.…
Q: What concentration of agar is used in a semisolid medium for motility determination? How does that…
A: Agar is a polysaccharide that is obtained from marine seaweeds. Agar is mostly used in food and…
Q: Nitrate reduction test can be used to differentiate between Pseudomonads and Enterobacteriaceae. You…
A: The nitrate reduction test is used to differentiate between Pseudomonads and Enterobacteriaceae or…
Q: Why does the nitrate reduction tube turn red after the addition of zinc?
A: Nitrate reduction test is used to find the bacteria who have the ability to reduce the nitrate.
Q: Why did Anfinsen use urea and β-mercaptoethanol in hisexperiments?
A: Christian Anfinsen conducted an experiment in the 1950s and determined that specific amino acid…
Q: What would happen if an ampicillin reagent is added to an Lysogeny broth agar plate that is below 50…
A: Ampicillin is an antibiotic which enables the synthesis of the peptidoglycan of bacterial cells wall…
Q: Why is lipopolysaccharide considered to be an endotoxin?
A: Lipopolysaccharide is an outer cell membrane component found in gram-negative bacteria.
Q: Where is the dissimilative nitrate reductase found in the cell?What unusual metal does it contain?
A: In anaerobic respiration, an inorganic nitrogen compounds are some of the most common electron…
Q: When is sterilization by filtration preferred over sterilization by heat? Why? What makes heat an…
A: Answer :- 1)Filteration is the sterilization process wherein there is the physical removal of…
Q: Study the given structures below. Which of the following are epimers? H 0 H- OH но H- H- HO- но -H…
A: Epimers are the stereoisomers that differ in arrangement of groups in a single chiral carbon. A…
Q: Identify the type of structural conformation found within the botulinum toxin molecule.
A: Clostridium botulinum produces the botulinum neurotoxin.
Q: Explain the extraction method and the procedure for extraction of Echinolone by using…
A: Chromatography works on the principle of molecules in a mixture being applied to a surface or a…
Q: What is the source of the purple color from which the purplesulfur bacteria get their name?
A: Bacteria are prokaryotic organisms. They are devoid of the cellular organelles like the golgi bodies…
Q: How would you distinguish between Listeria monocytogenes and othe Listeria species on Chromogenic…
A: Listeria monocytogenes is a motile facultative anaerobic gram-positive rod that is present in…
Q: What is meant by the term plating efficiency?
A: The cells are cultured over the plate at the particular growth conditions within a particular time…
Q: How was the product of streptomycin isolated by the scientist who discovered this?
A: Streptomycin was first discovered by the American biochemists Selman Walksman,Albert Schatz and…
Q: What is the trade name of Selegiline ?
A: Parkinson's disease is a neurological illness that impairs movement. Symptoms appear gradually,…
Q: List Precautionary Notes for each chemical. (Tetramethrin and Lambda-Cyhalothrin)
A: Preparatory Notes of Tetramethrin:Emergency treatment Measures:General exhortation If indications…
Q: In the Mannitol Salt Agar, why is there no observed growth of Escherichia coli?
A: In microbiology, mannitol salt agar is a typical growth media. It promotes the development of one…
Q: Why do most iron-oxidizing bacteria grow at anacidic pH?
A: Iron-oxidizing bacteria are those chemotropic bacteria that obtain the energy for their living and…
Q: Aside from Paraffin, what is your recommended infiltrating medium for routine purposes? why?
A: INFILTRATION is the process in which the clearing agent is completely removed from the tissue and…
Q: Since all of the ββ-lactams that you have tested are susceptible to hydrolysis by PaESBL-1, the…
A: Since all of the ββ-lactams that you have tested are susceptible to hydrolysis by PaESBL-1, the…
Q: Why is egg enrichment not added to BPA prior to sterilization?
A: Baird–parker agar or BPA is a selective medium is identify or isolate S. aureus in food. It contains…
Q: How does the nucleic acid being purified from associated protein and other impurities?
A: Nucleic acids isolation and purification involve lysis of the cells followed by the removal of…
Q: Using SP-Sepharose as ion exhange resin, indicate the starting and ending pH for the narrowest…
A: Ion exchange chromatography is applicable for the separation of charged molecules. In this…
Q: Why does hydrogen peroxide are most effective against probiotics?
A: Hydrogen peroxide is a peroxide. It acts as an oxidizing agent
Q: Before using the API® 20E System, what test must be performed to confirm the identity of your…
A: Bacteria are of two classes gram-negative and gram-positive bacteria. They are classified on the…
Q: why is Brocardia anammoxidan a Gram-negative bacteria? what does gram negative bacteria mean?
A: Answer. Bacteria are microscopic, relatively simple, prokaryotic organisms whose cell lacks a…
Q: If the seven-digit profile that is tabulated cannot be found in the API® 20E Analytical Profile…
A: The API® 20E System, is a biochemical panel for identifying and differentiating members of the…
Q: What is the hazard of the splattering tendency in flame sterilizing an inoculating loop? Can…
A: Aseptic preparation of culture media :-
Q: What is the most accurate method for the determination of acid insoluble lignin in a lignocellulosic…
A: The structural material of most of the plant support tissue is made up of lignin which is a very…
Why is sulfate (SO4
2-) added to a Winogradsky column?
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- Why is 70% the optimum concentration used in the preparation of ethyl as an antiseptic?Does Escherichia coli provide positive or negative results for the lysine decarboxylase and ornithine decarboxylase test results?What is the mode of action for kanamycin? Is it bacteriostatic or bactericidal? https://pubchem.ncbi.nlm.nih.gov/compound/Kanamycin
- A vial of Doxorubicin reads 0•5g per vial. Instructions say to reconstitute each 12mg with 2•5ml of NS. How many ml of NS will be needed to reconstitute the vial of the recommended concentration? please show workingHow much nystatin stock (50 mg/mL) needs to be added to 15 mL of tryptic soy agar to give a final concentration of 50 μg/mL?What does the red dye Prontosil have to do with sulfa drugs?