Why are the streak plates incubated at 7°C when selecting for psychrotrophic bacteria?

Q: How is this medium (the Mitis Salivarius medium) differential? What components make it a…

A: A growth medium or culture medium is the solid, liquid, or semi-solid, which is designed to support…

Q: Why is it important for the commercial canning process to destroy the endospores of Clostridium…

A: An endospore is basically a dormant, tough and non-reproductive structure produced by some bacteria.

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 are endospore forming bacteria commonly found in soil?

A: A bacteria is a cell which is susceptible to a variety of environmental stress. Any environmental…

Q: What effect does decreasing the incubation temperature have on bacterial growth rate? Why?

A: Bacterial growth is proliferation of bacterium into two daughter cells, in a process called binary…

Q: Does agar concentration affect the growth and morphology of bacterial colonies? What causes dense…

A:

Q: What bacteria is growing on this nutrient agar?

A: Microorganisms require nutrients for life, development, and reproduction, which are provided by…

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: 1) What are all of the different colony types that can be seen on a mixed-culture streak plate?  2)…

A: Hi! Thanks for your question. As you have posted multiple questions, I am answering only the first…

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: Why are semi-solid media such as TTC deeps suitable to test motility of bacteria?

A: There are several parameters which need to be studied in microbiology about different…

Q: Do Gram-negative bacteria grow on PEA agar? If not, what prevents their growth?

A: The differential and selective media are very useful to identify the microbes. These media are…

Q: What are the differences between conditions necessary for  the green and purple sulfur bacteria to…

A: Bacteria are single-celled organisms with a limited size. Bacteria can be found almost anywhere on…

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: How does McConkey agar serve as both selective medium and differential medium ?

A: MacConkey agar is a culture media that contain bile salts, crystal violet dye, neutral red dye along…

Q: citrobacter freundii

A: Citrobacter freundii is a species of anaerobic gram-negative bacteria which belongs to the family…

Q: In the multiple fermentation tube technique does the absence of gas formation after 24 hours…

A: Coliform microbes are life forms that are available in the climate and in the defecation of all…

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: hat are the components of a carbon-free broth or minimum medium for Bacillus subtillus ? An example…

A: Nutrient media is used for the growth of different microorganisms in laboratory.

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: 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: why would selecting a colony from a blood agar plate to test with enterotube be bad

A: Selecting a colony from a blood agar plate to test with an Enterotube may not be ideal for several…

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: what is the cause of different species of psychrotrophic bacteria growing in the CTSA medium at 7…

A: They can grow at extreme low temperatures and lead to spoilage of food by modifying the compounds…

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: Is  Bacillus cereus negative or positive for growing in high salt concentrations?

A: Bacillus cereus is a gram-positive, endospore forming, non-capsulated bacillus, motile with…

Q: If the inoculation of yeast during the process of vinegar making are not done, can we still produce…

A: Vinegar is nothing but acetic acid which is present in aqueous state. This can be used as flavouring…

Q: What method of bacterial measurement does this graph represent? Is it considered direct, or…

A: Here Bacterial growth is measured in terms of absorbance so, bacterial growth is measured with the…

Q: what  are these bacteria growing on BA and Maconkey agar

A: Blood agar or BA is an enriched culture medium having multiple nutrients. Blood agar is generally…

Q: The isolation of Salmonella Typhimurium and S.Typhi require different protocols: A) In what aspects…

A: Salmonella Typhimurium and salmonella typhi are the 2 diffrent specius of bacteria under same genus…

Q: why are psychrotrophic bacteria incubated at 7 degrees

A: Each species of microbe has a preferred temperature that lies somewhere between its characteristic…

Q: What culture medium can be used for the acclimatization of Bacillus and Pseudimonas to degrade…

A: Answer: CULTURE MEDIA = These are the selective and differential media which are used to grow…

Q: Do Gram-positive bacteria grow on PEA agar? If not, what prevents their growth?

A: Bacteria are common, mostly free-living organisms that are often made up of only one biological…

Q: What process would explain why the dyes spread through the agar?

A: Agar -- Agar is polymer and mixture of polysaccharides obtained from the cell wall of red algae .…

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 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: 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 does saliva not serve as a good microbialgrowth medium?

A: Saliva is the watery, frothy substance that is produced in the mouths of some animals, including…

Q: Can members of the genus Cytophaga be cultured on standard solidified media? Why or why not?

A: The microorganisms can be grown in-vitro by subjecting them to suitable growth conditions. The…