What is a starter culture and what is its purpose? What are the characteristics of a good starter culture and why is it necessary to add one to fermented foods instead of using the natural flora?
Q: What is the difference between a mixed culture and a contaminated culture if they both contain more…
A: In microbiology , a bacterial culture is a growth of microorganisms which have been grown in a…
Q: What is a mixed culture? A contaminated culture?
A: A microbiological culture, or microbial culture, is a technique for increasing microbial creatures…
Q: How would you use a differential and selective medium in the microbiological analysis of a…
A: Differential media refers to the media that allows for the visual identification of various…
Q: In spread plate method, colonies form within the agar and agar surface. In pour plate method,…
A: Introduction Agar media is essential for the study of microorganisms and molecular biology, It is a…
Q: How can one distinguish E. coli from P.aeruginosa on nutrient agar? blood agar? EMB agar? What is…
A: Psuedomonas aeroginosa iscan aerobic organism that is motile, gram negative , rod shaped bacteria…
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: ating and incubating an agar slant from a pure broth culture of a bacterial species such as E. coli,…
A: Aseptic transfer means transferring living microbes from one place to another without contamination…
Q: Why is mannitol salt agar (MSA) considered both a selective and differential agar for staphylococci?
A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…
Q: Why is it important to keep the culture at the correct incubation temperature when measuring the…
A: Generation time is the time which is taken by the bacteria to double in number during a specified…
Q: What are biofertilisers? A farmer is advised to add a culture of bacterium in the soil before sowing…
A: A fertilizer is a substance which is applied to soil or plant to increase the soil fertility or…
Q: Are the large numbers of microorganisms found in the mouth cause for concern? Explain.
A: We are authorized to answer one question at a time.Since you have not mentioned which one,I am…
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 is a selective medium? What is a differential medium?
A:
Q: What are the approaches for sterilization during the production of sterile products? Please answer…
A: destruction or complete removal of all living organisms and their spores is called as sterilization.…
Q: What is the importance of agar plates and bacteria cultures in food microbiology?
A: There are different culturing techniques such as agar plates, broth culture, stab culture and solid…
Q: Can you tell IF the pasteurization process is working in this milk producing plant? How can you…
A: Pasteurization is a process in which milk or milk product is heated to a certain temperature for a…
Q: Do Gram-negative bacteria grow on PEA agar? If not, what prevents their growth?
A: ANSWER;-
Q: how can you use the unique characteristics of Listeria monocytogenes to produce a growth medium that…
A: Selective media contains those nutritional factors which will provide the growth of only desired…
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: CTSA growth medium designed
A: Under the regulated conditions of the laboratory when microbial cells are allowed to grow and…
Q: How does pasteurization affect the number of bacteria present in milk?
A: Pasteurization: It is a process which involves heating liquids at high temperature for a particular…
Q: What is the purpose of food irradiation, and how does it work?
A: Irradiating food kills bacteria and extends life of the food.
Q: What is an E-test strip, and what is it used for in the microbiology laboratory? Draw a diagram of…
A: Microbiology is a branch of science which deals with the study of microscopic organisms such as…
Q: Why do you think the continuous culture has higher chances of contamination than batch and fed-batch…
A: Continuous culture may be a set of techniques wont to reproducibly cultivate microorganisms at…
Q: What types of bacteria are inhibited on MacConkey agar
A: MacConkey agar, contains peptones, lactose, bile salts, NaCl, neutral red (pH indicator), and…
Q: Why is agar ideal for microbial cultivation?
A: The microbial cultivation is the process in which microorganisms are cultivated in the laboratory,…
Q: Outline a method for preparation of tomato cell suspension culture and subculture
A: Cell culture is a procedure in which cells are grown under artificial conditions in suitable medium…
Q: What is a pure culture and how can one be obtained
A: Cells are the structural and functional units of life.
Q: Why are Sterilization, Antisepsis and disinfection necessary?
A: Sterilization is the process of killing or deactivating all forms of microorganisms and spores.…
Q: WHAT IS THE TYPE OF Growth patterns on Agar Slant and Broth Medium
A: Growth and morphogenesis of plant is determined by the composition of culture media. There are few…
Q: how often must bacteria be subcultured from a broth to maintain culture viability?
A: Answer: Sub-culturing is the method of regrowth of the bacterial cells in to a freshly prepared…
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: How does an autoclave sterilize instruments? What is used to dry glassware and at the same time
A: Autoclaving is the best method for sterilizing glass instruments. Sterilizing means removal of all…
Q: What is a pure culture and why is obtaining one useful inmicrobial ecology?
A: Microbes are living organisms. They are ubiquitous. They cannot be seen by the naked eyes. In…
Q: ow can one be sure that the culture media are sterile or free from contamination
A: Sterility, often known as sterility, is the state of being free of all contaminants and…
Q: What is the optimum growth temperature for most human pathogens? Explain.
A: Bacterial growth is the division of one bacterium into two daughter cells in a process called binary…
Q: Agar is a complex polysaccharide obtained from seaweed and cannot be digested by most…
A: Growth media is the nutrients rich medium that helps in the growth of several bacteria and other…
Q: What is thermal death time? What are the factors that may influence the efficiency of chemical…
A: Answer 1 :- Thermal death time is the way lengthy it takes to kill a particular bacterium at a…
Q: LAB produce organic acids that have shown to be effective against controlling the growth of…
A: Lactic Acid Bacteria (LAB) are Gram-positive, non-sporeforming, anaerobic cocci with G+C content of…
Q: What are the culture media that can be used for cultivating non-specific and specific…
A: A microbiological culture medium is a substance that promotes the growth, support, and survival of…
Q: Why do we grow the bacteria in minimal media when testing for citrate utilization
A: Minimal media are those that provide the minimal nutrients possible for colony development, usually…
Q: How do you do the continuous culture of bacteria by chemostat and turbidostat
A: Answer: CONTINUOUS CULTURE : It is the method of culturing/growing of bacteria in a media in a…
Q: How many different types of colonies can you find on the blood agar plate? describe each. (As shown…
A: Blood agar is general medium that is provided with the nutrients and can be use as a general growth…
Q: Can pure culture be prepared directly from a mixed culture? Explain your answer.
A: A microbiological culture, also known as a microbial culture, is a way of multiplying microbial…
Q: Why is the sterilization important in healthcare system and can you give briefly explain?
A: Medical sterilization mainly makes use of three important terms such as sterilization, disinfection…
Q: How is the CTSA (coconut tryptic soy agar plate) growth medium designed to meet the nutritional need…
A: TSA is a general-purpose plating medium that can be used to isolate, cultivate, and maintain a wide…
What is a starter culture and what is its purpose? What are the characteristics of a good starter culture and why is it necessary to add one to fermented foods instead of using the natural flora?
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- You are employed by a research institution that develops technology for food preservation. The head of the department wants you to develop a controlled fermentation procedure that utilizes carabao mango. The required flavour are as follows: tart and buttery taste. What LAB species will you utilize in the fermentation process? What method will you use in the starter culture preparation and addition? What are the essential ingredients and condition that will favour the growth of your starter culture?The principle and What type pf Media of the following Conkey Agar vii) MacConkey Broth viii) TSA Base for Blood and chocolate Agar ix) Mannitol Salt Agar x) Tryptic Soy Agar xi) Alkaline peptone water What is the principle of Growth Medium and Culture medium?What is the major difference between Thayer-Martin and chocolate agar? When would you use Thayer-Martin rather than chocolate agar?
- What are biofertilisers? A farmer is advised to add a culture of bacterium in the soil before sowing the crop. Name the bacterium in the culture. How is this bacterium useful to the crop?Where do spoilage microorganisms come from? What are some of the most common spoilage microorganisms? Did you have any in your samples? If so, which organism? Can some spoilage microorganism be dangerous? If so, how? Can spoilage microorganisms grow in the refrigerator? How can you prevent your food from spoiling?What is the importance of agar plates and bacteria cultures in food microbiology?
- How can one distinguish E. coli from P.aeruginosa on nutrient agar? blood agar? EMB agar? What is the major difference between Thayer-Martin and chocolate agar? When would you use Thayer-Martin rather than chocolate agar?In a bacterial culture on an agar plate, what is a zone of inhibition? An area where the growth of bacteria is increased compared to the rest of the agar plate An area where the growth of bacteria is prevented or reduced compared to the rest of the agar plate An area where the growth of bacteria is not affected compared to the rest of the agar plate An area where the the agar becomes contaminated with moldwhy is it important that a small amount of inoculum be used in preparation of an agar slant?