Q: Identify and describe the 4 wet-heat methods that are used to control microbial growth.
A: The different methods used for controlling the growth of microbes by moist heat are boiling,…
Q: If a bacterial isolate shows intermediate to moderate resistance to an antimicrobial, how might this…
A: Bacteria are microscopic single-celled prokaryotes that thrive in diverse environmental conditions.…
Q: Phenyl Ethyl Alcohol agar encourages the growth of what type of microorganisms?
A: Answer - Option A - Gram positive bacteria
Q: Which of the media types would predict is used to detect possible fecal contamination of water in…
A: The fecal contamination of water in Puget sound comes from sources like marine effluent discharge,…
Q: Which of the following bacteria can survive in in temperatures ranging from 390F (40C)---to 990F…
A: Thermophiles Are a type of heat-loving microbe that lives in a variety of ecological niches such as…
Q: Describe the advantages and disadvantages of aldehyde agents in microbial control.
A: The general formula of aldehydes is R-CHO. Several low molecular weight aldehydes are antimicrobial.…
Q: Before inoculating and pouring molten nutrient agar into a plate, why must the agar first be cooled…
A: Agar or agar-agar is a jelly-like substances obtained from red algae. Agar is a solidifying agent…
Q: What is the logic behind testing for E. coli to detect fecalcontamination of water?
A: Bacteria are unicellular prokaryotic organism that maintains a definite shape since it contains the…
Q: Why is it necessary to maintain aseptic conditions in microbiology?
A: Aseptic conditions means microbs free environment. Microbs means bacteria, virus and fungi. It may…
Q: Why does secondary treatment of wastewater require O2?
A: Secondary treatment is a part of wastewater disposal system, where the sewage or other waste waters…
Q: Why would it be impossible for gram-positive bacteria to storesulfur as gram-negative…
A: Gram-negative bacteria are bacteria that do not retain the crystal violet stain used in the Gram…
Q: Explain how detergents, soaps, and heavy metals can beemployed in clinical, commercial, and…
A: Soaps, detergents, and various cleaning agents are used in the household, clinical, and commercial…
Q: why it is useful to plot the microbial growth from a growing microbial culture?
A: The term microbial growth refers to the growth of a population of microbe, it is an increase in the…
Q: Why is the membrane filter method preferred to the most probable numbermethod (MPN) for the…
A: Most probable number (MPN) is a method used to estimate the numbers of bacterial cells in a water…
Q: Why do we test water for coliforms if they are not considered pathogenic?
A: Introduction Coliforms are gram-negative, non-sporulating and motile or immotile bacteria. They…
Q: What is the rationale for selecting E. coli as the indicator of water potability?
A: We are all aware of the fact that , water is crucial and vital for sustainability of life on earth.…
Q: micro-organisms are the most resistant to heat sterilization?
A: Most of the bacteria cannot survive adverse heat condition. But somehow particular bacteria can…
Q: Why is immobilization a good strategy for dealing with uraniumpollution?
A: Uranium (U) is a radioactive chemical element of the actinoid series of the periodic number with an…
Q: Why are complex media preferable to chemically defined media for routinecultivation of…
A: Microorganisms require nutrients as an energy source and certain other environmental conditions to…
Q: Why is the time of exposure and temperature required for sterilization greater for dry heat than for…
A: Any technique that removes, destroys, or deactivates all forms of life and other biological agents…
Q: What temperature is considered adequate for achieving sterilization of a compost pile?
A: temperature considered for achieving sterilization of a compost pile is 135-160 F. At a…
Q: What is the hurdle technology used to destry the microbial load in squash soup?
A: Squash soup is a liquid dish and it is present with High nutrients and low calorie i.e low carbs.…
Q: why do microorganisms differ in their response to disinfectants
A: Microorganisms are the minute microscopic organism that is generally invisible to the human eye.…
Q: What is the relation of microbail growth to microbial physiology?
A: Microbes are small organisms that are found in a diverse range of habitats. The rate of growth and…
Q: Which type of organism (obligate anaerobe, microaerophile, facultative anaerobe, aerotolerant…
A: Introduction :- Obligate anaerobes are organisms that can only survive in oxygen-depleted…
Q: What enzyme is required for hydrogen bacteria to grow asH2 chemolithotrophs?
A: Lithotroph: These are the different groups of organisms that use the inorganic substance for energy…
Q: What are some advantages and disadvantages of using ionizing radiation to sterilize food?
A: Sterilization involves physical methods for removing or controlling the microbes. The physical…
Q: Why do we study how to control microbial growth? Give concrete examples wherein our understanding of…
A: Introduction :- Bacterial growth occurs when a bacterium divides into two daughter cells, a process…
Q: Discuss briefly the phases of Microbial Growth Curve and why it is useful to plot the microbial…
A: For microbial growth many factors are important such as nutrients, temperature, pH, moisture and…
Q: Which microbial control agent would most effectively inhibit anaerobes and why
A: Hydrogen Peroxide
Q: Why must water be subjected to microbiological analysis?
A: Water is used for various purposes in daily lifestyle including food. Thus, it should be monitored…
Q: Compare and contrast the action of alcohols, halogens, and oxidizing agents in controlling…
A: Alcohol is used as disinfectant for centuries.Alcohol is extremely effective in fight against single…
Q: Describe the five phases of a microbial growth curve observed when microbes are grown in a batch…
A: Introduction: Bacteria is unicellular prokaryotic organism that can survive in any kind of…
Q: How can a microbial ecologist be sure that transformation of aradioisotope is actually caused by…
A: The radioactive wastes are generated in the environment by the action of power plants like the…
Q: Describe the five phases of a microbial growth curve observed when growing microbes are grown in…
A: The bacterial growth curve represents the number of live cells in a bacterial population over a…
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: What are the different types of Microbial Control
A: Microbial control agents are the biotically-derived chemical compounds or secondary metabolites that…
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: Which of the following groups of bacteria require or will use oxygen for respiration i. obligate…
A: Bacteria are defined as unicellular prokaryotes. They can survive or live in extreme environmental…
Q: What types of bacteria grow on nutrient agar?
A: Nutrient agar is a nutrient-rich medium that allows the growth of a wide range of organisms in the…
Q: What physical and chemical conditions are necessaryfor the rapid microbial degradation of oil in…
A: Biodegradation refers to the transformation of complex organic compounds by bacteria, fungi, and…
Q: Is there any pH buffering system or device for acidic microbiological experiments?
A: All biological processes are dependent on pH, cells and organisms must maintain their specific and…
Q: Spores and toxin-producing microorganism produce toxins need higher Aw than minimum Aw for microbial…
A: Water activity (aw) is basically a term describing the availability of water to microorganisms. It…
Q: What is an advantage of in-situ bioremediation as a means of eliminating contaminants over chemical…
A: Bioremediation technology is a waste management process which employs various live organisms for…
Q: How would you isolate thermophilic chemolithotroph that uses sulfur compounds as a source of energy…
A: A chemoautotrophic bacteria is able to manufacture food by using inorganic raw materials with the…
Q: How does being in a biofilm affect an organism’s susceptibility to antimicrobial agents?
A: Introduction Microorganisms can be found living in colony or in solitary. However, sometimes…
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…
Why is Escherichia coli used as an indicator organism in
microbial analyses of water?
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- Why is it important to distinguish between E.coli & E. Aerogenws in contaminated water samples?Is the eosin methylene blue agar? (EMB) a complex or defined medium? Explain based on its composition. What media is MSA explaining based on what kind of Organisms it allows to growWhy do we test water for coliforms if they are not considered pathogenic?
- Which techniques may be used for viable counting methods of microbial measurements? Explain.https://courses.lumenlearning.com/microbiology/chapter/controlling-microbial-growth/ Read this Article about Controlling Microbial Growth and answer the following questions: Which is most effective at removing microbes from a product: sanitization, degerming, or sterilization? Explain. What are two possible reasons for choosing a bacteriostatic treatment over a bactericidal one? Name at least two factors that can compromise the effectiveness of a disinfecting agent.What physical and chemical conditions are necessaryfor the rapid microbial degradation of oil in aquaticenvironments?
- Which type of organism (obligate anaerobe, microaerophile, facultative anaerobe, aerotolerant anaerobe) would most likely be affected negatively by the use of old media? Which type of organism (obligate anaerobe, microaerophile, facultative anaerobe, aerotolerant anaerobe) would most likely be affected positively by the use of old media? Which type of organism (obligate anaerobe, microaerophile, facultative anaerobe, aerotolerant anaerobe) would be least affected by old media?A microbiologist used the concept of enrichment culture to isolate aerobic and anaerobic nitrogen-fixing bacteria, sulfate-reducing bacteria, and sulfur-oxidizing bacteria. What kind of selective media could he haveused for isolating each of these four classes of microbes?Is there any pH buffering system or device for acidic microbiological experiments?
- What is the difference between assimilatory nitrate reduction and denitrification? Which reaction is performed by many microbes, and which is a more specialized metabolic capability?Why is water tested for coliform bacteria rather than for pathogenic bacteria which may be present?What sources of microbial contamination are in nutrient agar exposed in air,water,soil and plant leaves? What are the steps to removing or contaminating these sources?