Q: Of the two principal polymers used in column chromatography and electrophoresis, which one would be…
A: The column chromatography procedure is used to separate a single chemical compound from a mixture.…
Q: Find the amount of dehydrated medium needed to prepare 15 BUTTS, 20 SLANTS, and 25 BUTT-SLANTS.
A: Slants, Butt-slants, and butts are different types of media prepared for bacterial growth. Slants…
Q: Why does motility media contain a lower amount of agar than ordinary agar?
A: Agar is a phyco-colloid polymer of galactose monomers obtained from red algae (Gelidium and…
Q: What are non-ionic detergents?
A: Detergents are cleansing agents and commonly made from synthetic resources such as petroleum…
Q: Why do some bacteria grow in the presence of salts?
A: Carl woese in 1990, devide living world in three groups or domains Archaea, Bacteria and Eukarya.…
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: 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: What is the difference between defined media and complex media?
A: media is a solution in which is rich in nutrients. it is very suitable for the growth of microbes…
Q: Why would hydrogen peroxide be an effective disinfectant?
A: We have to answer why hydrogen peroxide can be an effective disinfectant.
Q: Besides better aeration and mixing properties, what other advantages do stirred tank bioreactors…
A: A bioreactor is a man-made device specially designed for supporting biologically active environment.…
Q: Why is it important to determine the number of mesophilic spores in a food ingredient?
A: Sometimes spore forming mesophilic bacteria found in food ingradient, mainly in dairy product. It…
Q: Why is 80% alcohol the recommended solvent For the preparation of plant extract?
A: Different plants have different properties due to the differences in their chemical composition,…
Q: What are high level disinfectants? What is an example of one? What is the method of action and the…
A: Disinfectants are chemicals that are used to kill the microorganisms present in the surroundings.…
Q: What is the function of mordant?
A: Gram staining is a common technique that is used to differentiate bacteria into two broad groups…
Q: Why does turbidity in a cultured media losses its reliability at high cell concentrations?
A: turbidity is used as a measure of cell density within a culture sample.
Q: What advantages do solid media offer for the isolation of microorganisms?
A: “Since you have asked multiple question, we will solve the first question for you. If you want any…
Q: Why is PBS buffer preferred when preparing a monolayer cell culture?
A: PBS (phosphate buffer saline) is a buffer solution which is a water based salt solution containing…
Q: What is one advantage of a pour plate over a streak plate?
A: The pour plate method is a technique used to count the number of colony-forming bacteria found in a…
Q: what is oil immersion and why is it used
A: Light microscope is a microscopic instrument which uses visible light and magnifying lens to to view…
Q: Of what practical importance are air borne microorganisms to the laboratory workers? What…
A: Questions related to the microbiology labs. Note: each questions are answered under particular…
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: Why are most antimicrobial chemical agents disinfectants rather than sterilants? What general…
A: Most chemical antimicrobial agents are disinfectants instead of sterilants. A disinfectant reduces…
Q: For preparation of a smear on a slide, what is the purpose of heat fixation? What problems can arise…
A: The preparing a slide that has to be observed under a microscope there are multiple steps that are…
Q: Why sucrose gives negative Benedict test?
A: Benedict's reagent is a chemical reagent which is a mixture of sodium carbonate, sodium citrate, and…
Q: What is the purpose of adding sodium bicarbonate to a culture medium?
A: >> The purpose of adding sodium bicarbonate to animal culture medium is that it acts as a…
Q: What are the advantages of solid media over liquid media?
A: Solid media-It is a growth medium which forms solid support for the growth of colonies of…
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: Can we use maceration to extract volatile oils? why or why not?
A: Plants produce volatile oils, which are odorous natural compounds. They are in charge of the…
Q: Why is a GasPak anaerobic jar necessary for the culture of anaerobes on Brewer’s anaerobic agar…
A: Brewer’s anaerobic agar and fluid thioglycollate medium (FTM) are used to grow bacteria. Both of…
Q: How might a synthetic detergent be superior to a normal soap?
A: INTRODUCTION - Soaps are sodium or potassium fatty acid salts made from hydrolysis of fats in…
Q: Of what practical importance are air borne microorganisms to the laboratory workers? What…
A:
Q: What is the substrate(s) that will be used by the microorganism to produce the calcite ?
A: Biomineralization is the process by which microorganisms and other living organisms directly or…
Q: Why must alcohol be diluted with water to about 70 % percent before it could be used as an effective…
A: 70% isopropyl alcohol is most commonly used as disinfectant and killing all surface microorganisms.…
Q: what is the difference between volatile oils and fixed oils in terms of degradation?
A: Oil is a triglyceride that is liquid at room temperature. It is a nonpolar chemical substance that…
Q: What are the advantages of solid media ?
A: Microbial culture is a method of multiplying microbes by allowing them to reproduce in a…
Q: What is the temperature for pasteurisation?
A: There are several methods to preserve food products and beverages or to increase their shelf life,…
Q: What type of agar is MacConkey agar?
A: MacConkey agar or MAC which is also described as a bacterial culture medium was named after the…
Q: You treat cells briefly with radioactively labeled cysteine and then transfer them to a medium with…
A: Cysteine is a nonessential amino acid. It is one of the amino acid that contains sulfur which allows…
Q: Which among the ingredients of this product is the main preservative? Explain.
A: For centuries, people have been preserving food. It all began with the ancient practice of…
Q: What is dimethyl sulfoxide used for in plant tissues culture
A: Tissue culture is the in vitro aseptic culture of organs, tissues, cells, or the whole plan under…
Q: Why is the temperature of pasteurization at 60°C?
A: Pasteurization was invented by a French Scientist called Louis Pasteur. It was first used in 1864.…
Q: What is the source of turpentine oil?
A: Turpentine oil used as medicine and solvent. It is composed of beta and alpha-pinene and also a…
Q: Why did we add agar after we measure the pH?
A: pH means p stands for potential or power.H stands for Hydrogen atom.It is the power of the Hydrogen…
Q: What is the basic purpose of the paper chromatography?
A: Chromatography is an important analytical method used to separate a mixture of chemical substances…
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…
Aside from Paraffin, what is your recommended infiltrating medium for routine purposes? why?
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- Why is immobilization a good strategy for dealing with uraniumpollution?Of what practical importance are air borne microorganisms to the laboratory workers? What precautions should be taken to control laboratory contaminants? Why are petri dishes incubated in an inverted position? Of what advantage is the using a solid and a liquid medium?If cultures are suffering severely due to alkaloid production and accumulation in the medium then, how can i overcome this problem?
- When is sterilization by filtration preferred over sterilization by heat? Why? What makes heat an effective sterilizing agent? Why are the conditions required for sterilization greater for dry heat (160-180°C for 1-2hrs) than for steam (121°C for 15min)?What is the purpose of adding sodium bicarbonate to a culture medium?Why does turbidity in a cultured media losses its reliability at high cell concentrations?
- Of the two principal polymers used in column chromatography and electrophoresis, which one would be most immune to contamination by bacteria and other organisms?What chemical constituents and properties of milk make it an excellent medium for the growth of microorganisms?Of what practical importance are air borne microorganisms to the laboratory workers? What precautions should be taken to control laboratory contaminants? What precautions should be taken to control laboratory contaminants? Of what advantage is the using a solid and a liquid medium?