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A: An endospore is basically a dormant, tough and non-reproductive structure produced by some bacteria.
Q: Why is a block of agar inoculated rather than streaking the fungal culture on a plate?
A: The culture medium or growth medium is a liquid, solid, or semisolid designed to support the growth…
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…
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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 can you use the characteristics of L.monocytogenes to produce a growth medium that is both…
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Q: Rickettsia rickettsii as far as size, morphology, arrangements, capsule, slim/layer, endospore,…
A: The family Rickettsiaceae is named after Howard Taylor Ricketts.
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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: why is it important that a small amount of inoculum be used in preparation of an agar slant
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Q: What makes the cell wall of Listeria monocytogenes interesting in regard to the Gram-negative cell…
A: Listeria Monocytogenes : It is a gram positive bacteria. This bacteria can grow at temperature…
Q: How is the CTSA (coconut water tryptic soy agar) growth medium designed to meet the nutritional need…
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Q: Why are the streak plates incubated at 7°C when selecting for psychrotrophic bacteria?
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Q: Why does dry heat require higher temperatures for longer time periods to sterilize than moist heat
A: Sterilization may be defined as the process which help in the complete removal of all…
Q: Can culture media be sterilized in the hot air oven? why or why not?
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Q: Can members of the genus Cytophaga be cultured on standard solidified media? Why or why not?
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Q: Name the source from where agar is commercially obtained.
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A: Flagella helps in movement of the bacteria, motility.
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Q: what is Rose Bengel Agar?
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Q: Gardnerella vaginalis is a gram variable rod. What type of media should be used when culturing for…
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Q: Why is P. aeruginosa resistant to many widely usedantibiotics?
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Q: What would happen if you forgot to add NaCl in culture used for isolating vibrios? Which species…
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A: **As per our guideline, we are supposed to answer only one question at a time. Please resubmit the…
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- Do you think Rickettsia rickettsii can grow on blood agar? Explain.1(a) 1. What is the theory upon which intermittent sterilization is based? (B) Is dry or moist heat more efficient as a sterilizing agent? Why? (C) When would it be necessary to use aseptic techniques when inoculating a tube of nutrient broth with dirt? (D)Why do some microorganisms characteristically form a growth of the pellicle type? What environmental factors might alter the formation of a pellicle? (This is not a graded assignment)how can you use the unique characteristics of Listeria monocytogenes to produce a growth medium that is both selective and differential?
- How is the CTSA (coconut water tryptic soy agar) growth medium designed to meet the nutritional need of psychrotrophs and mesophiles?Describe the appearance of an S. agalactiae colony grown on blood agar. Describe how that colony would differ in appearance from a colony of S. pyogenes.what is the physical characteristics of this streak plate? Look at a single colony on a streak plate and look for special physical characteristics such as: motility, possible presence of endospores and/or capsule, culture color?
- You are tasked with isolating and growing up large volumes of a soil actinomycete suspected of producing a novel antibiotic. Describe two variations in (a) culture substrate and (b) culture conditions you might try in order to identify optimal growth conditions. Why are microorganisms often good sources of antimicrobial natural products?why macconkey agar and mannitol salt are regard as salective and deffrental medium?During the preparation of a smear leading into simple staining of the bacterial culture S. epidermidis you forgot to heat fix the slide. What would you see on this slide as compared to a slide that was properly prepared? Please explain.
- Gardnerella vaginalis is a gram variable rod. What type of media should be used when culturing for it? Describe the appearance of the colonies.Which culturing method provided the clearest results, the semisolid medium tube or the soft agar plate? Explain.Why is the colony diameter of the yeast culture grown on potato dextrose agar is larger than those grown on acetate agar? Give and discuss the reasons for this different in growth.