give one reason why is it necessary to keep stirring the agar medium mixture in a beaker when heating in a hotplate?

Q: What is the BEST glassware that could be used to hold the agar powder while weighing? After 24…

A: As per our guidelines, we are allowed to answer only one question. Kindly upload the rest of the…

Q: Agar is a solidifying agent used in media preparation. What makes it ideal for cultivation of…

A: Agar is a natural polysaccharide. It is mostly used in the lab and acts as a solidified agent. It…

Q: What is sterilization? Give specific examples of media which are sterilized by the following…

A: All microbes, such as bacteria, virus, and fungi, requires some essential nutrients for growth. The…

Q: Can culture media be sterilized in the hot air sterilizer? Why or why not?

A: Hot air sterilization is a procedure in which the sterilization of the objects are done using hot…

Q: Which of the following would be best for sterilizing a pre-sealed case of plastic medical supplies?

A: Answer - Autoclave

Q: Choose two from the following culture preservations that are best to use when only an ordinary…

A: Many laboratories and biological companies maintain large culture collection centres. These are…

Q: which of the following is best to sterilize heat-liable (sensitive) solutions? a, pasteurization…

A: From above question Option d (filtration) is correct.

Q: We will use liquid oxidase reagent for the oxidase test. What color will the colonies turn if they…

A: Oxidase test is used to determine the presence of cytochrome c by a bacterium. This test belongs to…

Q: Make vinegar using starch as raw material. Outline the process steps in a schematic diagram stating…

A: The term vinegar actually refers to the two-step process of fermentation from carbohydrate to…

Q: Explain the function of the ferrous ammonium sulfate in SIM agar.

A: SIM agar test is used for the differentiation of gram-negative enteric bacilli based on their…

Q: How is the correct way of incubating culture plate media? Explain why is that so.

A: After the way of life medium is set, and streaked with the necessary microbe/stock, the cover is put…

Q: In some cases, why does a chemical is more effective as a microbicide  when it is diluted rather…

A: An antimicrobial is an agent that kills microorganisms or stops their growth. Antimicrobial…

Q: Name and explain the culture media that can be used for cultivating non-specific and specific…

A: a) nutrient agar & tryptic soy agar, & brain heart infusion agar are culture media that can…

Q: Explain the importance of using a control tube with only broth when measuring turbidity in a…

A: A spectrophotometer is used to measure the turbidity of a microbial culture sample. It is also used…

Q: Compare and contrast use dilution and disk diffusion methods of evaluating disinfectants. Please…

A: Chemical disinfectants are gathered by the sorts of organisms and infectious agents they are…

Q: In casein hydrolysis what is the differance in weak + and strong+ reaction on the agar plate? Would…

A: The enzyme caseinase is secreted into the external media from the cells (an exoenzyme), catalyzing…

Q: You have a broth medium that you would like to turn into a solid medium in order to do streak…

A: The "nutrient broth" is essentially nutrient agar without the solidifying agent. They stay liquid at…

Q: Show a concept map about the aseptic technique on Transfer from Broth to Broth Culture, Transfer…

A: Aseptic techniques or sterile techniques are procedures that ensure proper handling and conduction…

Q: Describe and give the principle of autoclave, Hot Air Oven and a Hot Plate used for sterilization in…

A: Sterilization in microbiology: This technique is used for the killing of the harmful bacteria on 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: Explain why it is essential that bacteria cultures be sterilized in an autoclave.

A: The microbial cultures are grown in the laboratory so as to multiply them or increase the number of…

Q: What is differential medium

A: Differential medium or indicative media contain compounds which support the growth of microbes 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: If a component is heat sensitive, how might you conveniently achieve sterility of that medium? a.…

A: Option A i.e. filtration

Q: What are the possible ways to sterilize heat labile products? Explain your answer with suitable…

A: Heat labile materials are those substances that can undergo change rapid change when exposed to high…

Q: who introduced the use of cotton plug in microbial culture tubes.

A: Cotton plugs are utilized in bacterial specimens and culture mediums. The cotton plugs' primary role…

Q: Can culture media be sterilized in the hot air oven? why or why not?

A: Sterilization is the process of deactivating, killing, or removing any kind of microorganism (or…

Q: Agar is a solidifying agent used in media preparation.a. What is its origin? b. What makes it ideal…

A: A growth medium or culture medium is a gel or liquid designed to support microorganism growth. The…

Q: What is the difference between selective and differential media? Give one example of each.

A: Culture medium is referred to as a medium of nutrients that supports microbic growth. The amount of…

Q: Why is it necessary to store the molten agar in a water bath at 50 degrees Celsius?

A: Introduction:-  Agar is made up of two polysaccharides: agarose and agaropectin, with agarose…

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: what information about the identity and physiology of a bacterium or yeast can be learned from…

A: Micro organisms are grown in a solid medium (agar) with supplements as a primary step in order to…

Q: Explain the rational of using saponification-solvent extraction to extract pyrene from milk

A: Asked : Rational of using saponification-solvent extraction to extract pyrene from milk

Q: Why should you filter some liquids for sterilization, rather than autoclaving them?

A: To control microbial growth or contamination there are a number of aseptic techniques developed that…

Q: Explain the effect that environmental factors exert on the growth and development of an algal batch…

A: The growth and development of algae is controlled by various environmental factors. This includes,…

Q: explain methods for cleaning beans using flat bed screen and drum spray cleaner

A: Much of the mechanical cleaning procedures must be performed in the field for proper storage of the…

Q: What type of media components cannot be sterilized in an autoclave?

A: Sterilization refers to the complete destruction or elimination of all viable organisms. The process…

Q: Illustrate the different solid tubed media formed  1. Deep/Butt solid tubed media 2. Slant solid…

A: The selection of media is a crucial point in determining the generation of contamination-free…

Q: Which of the following types of media would be appropriate to use in order to culture a fastidious…

A: Answer:- From all the four above-mentioned medias yeast extract media and nutrient media are…

Q: Assume that you had plated your +PGLO culture on an LB agar plate. What result (number of colonies)…

A: +pGLO culture is a type of bacteria that has been genetically modified to produce a fluorescent…

Q: What is the meaning of the word sterile? What would happen if culture media freshly prepared were…

A: Sterile It refers to the state of being free from any bacteria or any other living microorganisms.…

Q: Agar is a solidifying agent used in media preparation. How and why does the agar concentration in…

A:

Q: Could a MacConkey agar plate be used in place of the EMB plate in the Standard Analysis of Water?…

A: MacConkey agar is used as a differential and selective culture medium used in analysis of water…

Q: Which ingredient is included in the motility test to make the results easier to see? bromthymol blue…

A: A motility test is a test that is performed to check whether the organism is motile in its nature or…

Q: If you have a culture with 1 x 106 cells per ml, how could you use serial dilutions to obtain a…

A: Serial dilution  It is a method of stepwise dilution of a concentrated solution to get the desired…