Q: What are ambient microorganisms? Why should they not be present duringsubculturing?
A: There are some living organisms that cannot be seen by the naked eye and only can be seen under the…
Q: What gram-positive bacterium can give a positive presumptive test?
A: In microbiology, the presumptive test is used to find out the presence of gas-forming lactose…
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 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: What is unusual about the bacterium Gemmata?
A: Prokaryotes are the organisms that do not have the nucleus enclosed in an envelope. These are…
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: 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 staining of stool samples very important in identifying parasites?
A: In this question it is to describe that why is staining of stool samples very important in…
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: 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: What is the correct Gram reaction of the unknown bacterium growing on your MacConkey agar (Gram (+)…
A: MAC is a selective solid growth media in which the bacteria can be classified and observed on the…
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: What is the oxygen requirement and gram reaction of Naegleria fowleri? Is it Aerobic or Anaerobic?…
A: Naegleria fowleri is a amoeba,which are free living .They are present in soil ,water bodies,decaying…
Q: Is the Triple-Sugar Iron Agar (TSIA) a complex or defined medium? Explain based on its composition.…
A: A growth medium is a also known as a culture medium which can be solid, liquid, and even…
Q: What is culture media? Which culture media is used for gram negative bacteria and which one for gram…
A: Microbiology is the branch of science which deals with the study of different types microorganisms…
Q: What is the laboratory's policy in decontaminating the plates? Since the growth of H. pylori was…
A: Routine decontamination of lab countertops or paintings areas needs to occur frequently. Lab benches…
Q: On what medium is the membrane filter incubated? Describe the appearance of coliforms on this…
A: Membrane filter technique is used for the enumeration as well as isolation of microbes in the water…
Q: how does increasing the incubation temperature at which a plate containing psychrotrophic bacteria…
A: Psychrophiles or cryophiles (adj. psychrophilic or cryophilic) are extremophilic organisms that are…
Q: How does alkaline treatment improve the quality of agar/carrageenan extracted from the seaweed…
A: Agar is a polysaccharide created from two essential additives. Agarose and agaropectin. Agarose is…
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: why macconkey agar and mannitol salt are regard as salective and deffrental medium?
A: A culture medium is just water and nutrients that support microbic growth. Primary culture media for…
Q: what is the culture media for gram-positive bacteria?
A: The culture media for gram positive bacteria is Mannitol salt agar . The presence of bile salts, as…
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: 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 is the correct way to write this microbe’s name: bacillus subtilis, Bacillus subtilis, Bacillus…
A: Microorganisms are also known as microbes and they have a binomial nomenclature.
Q: What is the oxygen requirement and gram reaction of Pyrodinium bahamense and Caulerpa lentillifera?…
A: Oxygen is a gas that is necessary for life. Oxygen is needed for respiration, which is the process…
Q: What is the Gram Stain reaction and Microscopic Morphology for Enterococcus Faecalis and Proteus…
A: Question -What is the Gram Stain reaction and Microscopic Morphology for Enterococcus Faecalis and…
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: What is the Gram Stain reaction for Enterococcus Faecalis and Proteus mirabilis?
A:
Q: Is brocadia anammoxidan Gram positive or negative?
A: Based on the composition of cell wall, bacteria are classified in two groups. One is Gram-positive…
Q: What are some of the reasons for a gram-variable reaction?
A: Gram staining is a common technique used to differentiate two large groups of bacteria based on…
Q: What is the Gram reaction and oxygen requirement of Sporothrix schenckii?
A: Sporothrix schenckii is considered a thermally dimorphic fungus with a ubiquitous distribution. It…
Q: How should agar plates be incubated? Why?
A: Incubating the plates to stimulate the growth of microbes is a crucial step in any microbiology…
Q: What key role does Acidithiobacillus ferrooxidans play in thecopper leaching process?
A: Bioleaching is the process that involves the action of microbes to extract specific metals from…
Q: Why is it important to distinguish between E.coli & E. Aerogenws in contaminated water samples?
A: E.coli is a rod-shaped, gram -ve, facultatively anaerobic, coliform bacterial species that is…
Q: What is the definition of Gram Positive?
A: When the stain combines with bacteria in a sample and the bacteria will either stay purple or turn…
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: Why are dilute culture media used for isolating pelagicmicrobes?
A: Pelagic habits are abundant in microbes. The diversity spans domains, however it is usually seen…
Q: how could you determine if there is any contamination on your agar?
A: Agar consists of two polysaccharides, agarose and agaropectin, but agarose making up about 70% of…
Q: Why does uninoculated agar plates still has visible growth of microorganisms? Where do you think the…
A: Microorganisms are present in abundance in nature. When there are no aseptic conditions then…
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: explain why you would expect to see similarities in the types of colonies on the fomite plates and…
A: Organisms that are too small to be seen by the naked eye are microorganisms. These organisms can be…
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: Based on the bacterial cultivation, what are the possible organisms under its gram reaction?
A: Gram reaction in microbiology is a staining procedure that is used to differentiate bacteria based…
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- Describe the appearance of coliforms on Levine EMB agar.Why are the streak plates incubated at 7°C when selecting for psychrotrophic bacteria?3.1) What are the reasons for finding Gram-positive organisms on a MacConkey agar plate? 3.2) What does it mean if the Gram-negatives on the MacConkey agar form red or colourless colonies? 4) A solution contains the following: 5% NaCl, 12 g/l of agar-agar, 0.1 M NaOH (M, = 40 g/mol). Calculate how much of each is needed for 550 ml. Show all 653 PM 18°C NO Back F4 7 8 6 4 5 P R G LO
- what are these bacteria growing on BA and Maconkey agarwhy is it important that a small amount of inoculum be used in preparation of an agar slant?1. . Does a positive presumptive test mean that the water is absolutely unsafe to drink? Explain. 2. Describe the appearance of coliforms on Levine EMB agar. 3.. List five characteristics of coliform bacteria.
- Write a paragraph explaining the Gram stain result and the differences in the endospores of these three spices: a) Clostridium perfringes b) Clostridium tetani C) Clostridium botulinumwhy are psychrotrophic bacteria incubated at 7 degrees?1) would you describe the contents of the soil-inoculated broth as being a “pure culture”? Why or why not? 2) How did the uninoculated broth differ in appearance from the broths inoculated with E. Coli and M. Luteus? And then how could you tell if a supposedly sterile, uninoculated broth was contaminated? Please explain in detail and highlight the important parts cuz I am confused and need help! Thanks
- why macconkey agar and mannitol salt are regard as salective and deffrental medium?9. Is the eosin methylene blue agar (EMB) a complex or defined medium? Explain based on its composition. Is MSA a A) differential, B) selective, or C) both differential and selective media? Explain based on what kind of microorganisms it allows to grow.why is it that psychrotrophs placed in TSA medium are incubated at 7oC?