Q: Which of the following is an organism involved in nitrification? Nitrosomonas Clostridium…
A: According to the question, we have to find out which of the following is an organism involved in…
Q: As a microbiology student, how can you prevent or control coliform contamination in drinking water…
A: Coliforms are found in feces and warm-blooded animals and humans. They are pathogenic when found in…
Q: In a bacterial culture on an agar plate, what is a zone of inhibition? An area where the…
A: Microbial culture is a method of multiplying microbial organisms by letting them reproduce in…
Q: What aare Agrobacterium tumefaciens ? why they are used ?
A: BASIC INFORMATION MICROBES They are the unicellular organisms which can not seen by naked eyes…
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: What is the correct shape of the unknown bacterium growing on your MacConkey agar?
A: Macconkey Agar This agar includes bile salts, which are found in the gut. Bile salts help in…
Q: Does a positive presumptive test mean that the water is absolutely unsafe to drink? Explain. 2.…
A: Presumptive tests are cheaper than the confirmatory test. These tests are conducted to ensure the…
Q: Explain whether the MacConkey agar plate inoculated with good water would show the presence of…
A: Water contamination is the presence of unwelcome particles in the water. Water bodies may become…
Q: 1-________terms describe the form of bacterial colonies on nutrient agar plate. 2- ______ is a terms…
A: INTRODUCTION A growth medium, also known as a culture media, is a liquid or gel that helps bacteria,…
Q: What is the purpose of the crystal violet, bile salts, and neural red in MacConkey Agar media?
A: MacConkey Agar or MAC is a culture medium. It is a selective and differential medium designed for…
Q: Noah wanted to transfer Staphylococcus aureus from a broth to an agar plate. He picked up the broth…
A: The aseptic techniques are applied in the laboratory setup to reduce the risk of contamination. It…
Q: why is it that psychrotrophs placed in TSA medium are incubated at 7oC?
A: Psychrophiles are organisms that can survive and reproduce in low temperatures as low as -20 degrees…
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: What will the appearance of Escherichia coli be on MacConkey Agar red and Eosin Methylene Blue (EMB)…
A: UTIs are commonly caused by uropathogenic E.coli. Extraintestinal infections such as meningitis and…
Q: What is the correct arrangement of the unknown bacterium growing on your MacConkey agar?
A: MacConkey agar (MAC) was the first solid differential media to be designed by Alfred Theodore…
Q: MSA/mannitol salt agar plate is selective because: O it allows only gram positive bacteria to grow O…
A: Mannitol salt agar(MSA) It is a selective medium used for the isolation, enumeration and…
Q: How do large producers ensure there is no contamination by other bacteria and molds, why is it…
A: One of the main causes of food spoilage is by microorganisms such as molds, yeast, and bacteria.…
Q: Describe how each of the following would appear when grown on EMB agar: a. Escherichia coli b.…
A: EMB stands for Eosin Methylene Blue. This media is used as a seletive stain for the gram negative…
Q: A broth culture is initially inoculated with a single bacterial cell. For the first hour the…
A: * Given that The bacteria has generation time of 30 minutes. So it takes about thirty minutes to…
Q: MacConkey Agar Lactose fermenter or non-fermenter: ___________________________ Gram reaction based…
A: Alfred Theodore MacConkey invented MacConkey agar (MAC) in the twentieth century, which was one of…
Q: How would you distinguish between Staphylococcus aureus and S. epidermidis on mannitol salt agar and…
A: Hi! Thanks for your question. As you have posted multiple questions and have not mentioned which one…
Q: What type of agar would you use to grow gram positive bacteria
A: Bacteria are different from the plant as well as animals. They require specific substances in the…
Q: what are psychrotolerant bacteria and examples of it.
A: Psychrotolerant bacteria Psychrotolerant bacteria, or those that can grow at temperatures below…
Q: Which lactose (+), Gram negative, short rod forms a pink to brick red colony on MacConkey's agar and…
A: Bacteria that cannot retain the crystal violet stain as their cell envelopes are composed of…
Q: How you can differentiate between Escherichia coli and Shigella on MacConkey agar?
A: The term “Culture media” defines the solid, liquid, or semi-solid design to assist the…
Q: Which bacterium reduces nitrates in soil to nitrogen?
A: Nitrogen is needed by the organism for producing amino acids. Atmospheric nitrogen cannot be used as…
Q: What is the correct shape of the unknown bacterium growing on your mannitol salt agar
A: Mannitol salt agar also known as MSA is commonly used selective agar in microbiology. This material…
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: explain how the use of an Eosin methylene blue agar plate can help determine the type of fermenters…
A: Eosin methylene blue agar (EMB) is a selective and differential media.
Q: How does the extremely high resistance of bacterial endospores influence sterilization practices,…
A: Endospore refers to a nonreproductive, dormant composition generated by some kind of bacteria. It…
Q: How is air contamination prevented when an inoculating loop is used to introduce or take a bacterial…
A: Biotechnology is a branch of biology, including the use of living organisms to produce products.…
Q: Why are the streak plates incubated at 7°C when selecting for psychrotrophic bacteria?
A: Bacteria are unicellular, prokaryotic organisms which are devoid of membrane bound organelles and a…
Q: Please explain how the use of an Eosin Methylene Blue Agar plate can help determine the type of…
A: Eosin Methylene Blue (EMB) agar is a differential microbiological medium, which somewhat hinders the…
Q: The nitrites part of the dipstick test is mainly looking for which family of bacteriaE…
A: Kidneys are the organs belong to excretory system in our body and play a major role in several other…
Q: What bacterial genera are often included in probiotic foods?
A: Probiotics are live bacteria or yeasts that are good for our body, especially for our digestive…
Q: Which bacterium helps in dairy industry?
A: Bacteria are unicellular and prokaryotic organisms that live in wide variety of environments. It…
Q: Based on the growth you saw on your Lee’s Agar plate, what conclusions can you make about the…
A: Lee Agar is used to study the bacteria that can grow on yogurt. It is primarily used to count the…
Q: What are the reasons for finding Gram-positive organisms on a MacConkey agar plate?
A: As per our honor code, we are allowed to answer one question at a moment. You have posted multiple…
Q: What type of agar would you use to grow gram negative bacteria
A: Gram-negative bacteria are the bacteria that do not consist of the crystal violet stain and they are…
Q: What media should you use to cultivate the following microorganisms: E.coli Haemophilus sp.…
A: Note - we are supposed to answer 3 subpart of the question. Please repost the remaining ones…
Q: Draw two tubes showing how you have inoculated microorganisms in urease and in nutrient agar
A: Inoculation is the transfer of the bacteria on the nutrient medium to show its growth. The tools…
Q: selective agar media for gram-positive bacteria?
A: Phenyl Ethyl Alcohol Blood Agar is a selective media for gram positive bacteria.
Q: Why are psychrotrophic bacteria of concern to those in the food-service industry?
A: Psychotrophs are mesophiles. They can grow at a low temperature such as 4℃. And, their optimal…
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…
Q: Why do petroleum-degrading bacteria need to attach to thesurface of oil droplets?
A: Petroleum is a crucial strategic resource and all countries compete fiercely for it. The…
Q: what present microorganisms in flipper spoilage and springer spoilage
A: Spoilage of food is often observed in canned food items. There are roughly four types of bulged or…
Q: Do all gram negative organisms grow on EMB? A. no B. yes
A: EMB (Eosin methylene Blue) is a kind of media that is used to differentiate lactose fermenting…
Q: Describe the appearance of coliforms on Levine EMB agar.
A: Coliform bacteria are found in a diverse range of places like waste products of animals, water…
Q: Certain endospore-forming bacteria are a particular concern of the canned food industry. Name one of…
A: Some bacteria can survive adverse environmental conditions such as extreme temperature differences…
what are these bacteria growing on BA and Maconkey agar
Blood agar or BA is an enriched culture medium having multiple nutrients. Blood agar is generally prepared by supplementing blood with blood agar basal media such as Tryptic Soy Agar and Columbia Agar.
MacConkey agar is a differential culture medium. It is composed of bile salts, neutral red dye, and crystal violet dye.
Step by step
Solved in 2 steps
