Q: Is staphylococcus epidermidis a halophile?
A: Bacteria grows when they meet the certain requirement like- chemical, physical conditions in their…
Q: What are the materials used to grow microorganism like Spirulina?
A: Introduction In this question we will discuss about the materials used to grow microorganisms like…
Q: If a culture had 4 cells to begin with and has a generation time of 60 minutes, how long would it…
A: "Microbiology" is the study of microorganisms and associated topics. Microbiology has gone a long…
Q: Why would farmers be concerned about nitrifying bacteria?
A: Nitrifying bacteria are a small group of aerobic bacteria belonging to the family Nitrobacteraceae…
Q: Why do you have to boil the agar solution before dispensing it into tubes?
A: Agar is the medium which can used to grow the micro organisms in petri plates. The selected…
Q: Which characteristic of the species used determines whether sterility was achieved when autoclaved?
A: Microorganism: These are too small organism which is impossible to see by naked eyes. They exist in…
Q: Explain why a green metallic sheen is formed when E. coli is grown on Eosin Methylene Blue Agar.
A: Escherichia coli is the gram negative bacteria.
Q: Why is the culture medium referred to as a highly enriched laboratory soil?
A: Culture medium is referred to as highly enriched laboratory soli because it provides all the…
Q: What kind of medium might you make to selectively grow a bacterium that lives in your gut?
A: MacConkey agar is used as a selective and differential media for differentiating gut bacteria which…
Q: Some exconjugants did not grow on minimal medium. On what medium would they grow?
A: Exconjugants can be described as bacterial cells, which separates following the conjugation. A…
Q: What growth factor is often supplied for cultivation of fastidious bacterial pathogens?
A: A fastidious organism requires specific nutrients for growth. In microbiology, the culture medium…
Q: What is the purpose of the mashing step in beer-making?
A: Beer is an alcoholic beverage. The production of beer involves the following steps : malting,…
Q: How does bacteria grow on agar plates?
A: Bacteria are the most primitive organisms on Earth. They can survive in most extreme environments as…
Q: Explain the purpose of the phenol red in the medium.
A: Phenol red is a water soluble dye that functions as a pH indicator in culture media. Phenol red…
Q: What makes Mycobacterium resistant to staining?
A: Staining is a technique used in slide preparation to color the specimen.With light microscopy,…
Q: Why is the loop flamed before it is placed in a culture tube? Why is it flamed after completing the…
A: The term sterilization refers to any process that eliminates, kills, removes, or deactivates all…
Q: Do Gram-negative bacteria grow on PEA agar? If not, what prevents their growth?
A: ANSWER;-
Q: Name the source from where agar-agar is obtained.
A: Agar-agar is a gelatinous substance that is formed by a combination of linear polysaccharide agarose…
Q: Where should a label be written on an agar plate?
A: The aseptic technique is applied in a laboratory setup to reduce the risk of contamination. It…
Q: If yellow xanthophylls were present in the extract, why did the extract appear green?
A: Introduction: Xanthophylls are a class of oxygen-containing carotenoid pigments that is liable for…
Q: How is agar in the petri dish prepared to grow the bacterial specimen? explain in your own words.
A: Agar is a polymer made up of subunits of sugar galactose and is a component of cell walls of several…
Q: why do We need to Wait for the iron Agar to set and then Add another thin layer of 45°C Iron Agar?
A: The test that uses iron agar is the Triple Sugar Iron (TSI) Test and is used to determine the…
Q: Why do you think autoclave sterilization of media is preferred over open flame?
A: An autoclave is used to sterilize surgical equipment, laboratory instruments, media and other…
Q: What is selective medium?
A: Description of a selective medium.
Q: How would the slide appear if the bacteria were stained with safranin, a basic red dye?
A: The appearance of bacteria, when stained with safranin, is to be determined.
Q: Why would cells that are vigorously growing when inoculated into fresh culture medium have a shorter…
A: Growth curves are generally the description of the density of cell populations in liquid culture…
Q: Do Gram-positive bacteria grow on PEA agar? If not, what prevents their growth?
A: Bacteria are common, mostly free-living organisms that are often made up of only one biological…
Q: What compounds or chemicals might be added to a medium to make it selective?
A: Culture medium or growth medium is a liquid, solid, or semisolid designed to support the growth of…
Q: Name the source from where agar is commercially obtained.
A: Agar is a jelly-like substance that is made up of linear polysaccharide agarose and a heterogenous…
Q: How is household antibacterial soap like a weapon against pathogenic bacteria?
A: Antibacterial soaps are those that contains certain chemicals that inhibit the growth of pathogens .
Q: What is agar and what makes it the best agent for making culture media? explain
A: Microbiology is the branch of science which deals the study of different microorganisms such as…
Q: what is the theory about the mechanism of the gram-stain reaction
A: Introduction :- A Gram stain test looks for bacteria in areas where an infection is thought to have…
Q: Which dye will not kill microorganisms if a wet preparation is made? Why?
A: Microorganisms are defined as organisms that cannot be viewed by the unaided eyes and are studied…
Q: Which culturing method provided the clearest results, the semisolid medium tube or the soft agar…
A: Agar is a jelly-like substance obtained from red algae. It is a mixture of two components namely…
Q: Why does nigrosin not stain the bacteria?
A: Nigrosin is an acidic stain, used in the negative staining technique. Staining is a part of…
Q: What are the factors that influence the efficiency of chemical sterilization?
A: Chemical Sterilization is the process of removal of microorganisms by the use of chemical…
Q: How is it possible to know that a recently extracted essential oil is harmful for human use?…
A: Oils are basically nonpolar chemical substance that is composed of hydrophobic or lipophlic ends.…
Q: Write the limitations of sterilization by Dry heat?
A: The dry heat sterilization technique includes the removal or killing the microorganism and require…
Q: Why are vegetables and fruits coated with wax during shipping and upon storage?
A: Lipids are not polymers like other biomolecules like proteins and carbohydrates. It plays a major…
Q: What might have been some of the culture conditions used to isolate A. fumarolicum?
A: A.fumarolicum is an Extremophile. They are acidophilic, thermophilic and methanotropic in nature…
Q: Why is chlorination, although beneficial in terms of bacterial pathogen control, of environmental…
A: Chlorination is a disinfection procedure in which microorganisms are killed by the use of chlorine…
Q: What is the major difference between Thayer-Martin and chocolate agar? When would you use…
A:
Q: What is Bt cotton??
A: A GMO or genetically engineered organism is the outcome of recombinant DNA technology or RDT that…
What process would explain why the dyes spread through the agar?
Step by step
Solved in 2 steps
- Why the microorganisms in the hay infusion are not stained?In the preparation of a bacterial smear, why is there a need to fix the bacteria to the slide? Aside from passing the slide over a flame, what are the other ways of fixing the bacteria to the slide?About the Gram staining technique, explain: What is the purpose of using lugol and alcohol in this type of coloring?
- What is agar and why is it necessary for growing bacteria on plates?Why would farmers be concerned about nitrifying bacteria?What is the name of this media? What type of media is it? What does the yellow color indicate? What makes this plate have a pink color? What ingredient makes this medium selective? What organism can grow in this plate?