Q: Using one of the graphs obtained with the medium II, name the different phases of the bacterial…
A: Micro organisms are typically grown in a closed culture media. Nutrients are added according to the…
Q: What is a cytocidal infection? What is a cytopathic effect?
A: SOME BASIC INFORMATION ABOUT INFECTIOUS AGENTS It is pathogens or the microorganisms which are…
Q: Why would it be important for the Kirby-Bauer disc diffusion test to use a standard concentration of…
A: An antibiotic susceptibility test is the disk diffusion or agar diffusion test, or Kirby-Bauer test…
Q: What is the similarities of differential centrifugation and gradient centrifugation?
A: Similarities between differential centrifugation and gradient centrifugation is process involved…
Q: What steps are necessary to ensure the sterility of materialcontaminated with bacterial endospores?
A: During endospore formation, the bacteria protoplasm is condensed to a limited volume, which leads to…
Q: why is peptidoglycan synthesis inportant in antibiotic activity? why do antibiotics not interfere…
A: Answer: PEPTIDOGLYCAN : It is a polymer which is made up of sugars and amino acids thats forms the…
Q: In growing E.coli, why is that (reasons) they do not grow after doubling time under 20 degrees…
A: In a core typical range of its growth temperatures (20 to 37°C), Escherichia coli cells will grow…
Q: Differentiate between a microbistatic and microbicidal agent.
A: Microbicidal and microbiostatic generally fall within the antibacterial scope. The toxic gas…
Q: How is the CTSA (Coconut tryptic soy agar) growth medium designed to meet the nutritional need of…
A: Coconut trypic soy agar media are general-purpose, non-selective media that provide enough nutrients…
Q: Can a bacterium be positive for both MR and VP? explain
A: MR(Methyl Red) test is performed to detect glucose fermenting bacteria. The MR test acts as a pH…
Q: Why is CFU more applicable to a culture of Streptococcus than to a culture of E. coli?
A: Colony-forming unit (CFU) represents the number of colonies formed on the media plate from one…
Q: LB (Lysogeny broth) medium for the growth of E. coli,
A: Pseudomonas putida is a kind of rod-shaped, Gram-negative, non-fermenting bacterium which is present…
Q: If you altered the conditions under which bacterial growth normally occurs (i.e. increase the…
A: The bacterial growth curve is a series of several steps starting from the lag phase, log, stationary…
Q: What are two advantages that a motile bacteria has over non motile?
A: Motile refers to moving ability. It means that any substance that may move from one spot to the next…
Q: How do hypertonic environments negatively affect most bacterial cells?
A: Bacteria are prokaryotic, single-celled organisms lacking nucleus as well as other membrane-enclosed…
Q: Why does a one-step growth curve differ in shapefrom that of a bacterial growth curve?
A: Growth curves are generally the description of the density of cell populations in liquid culture…
Q: Can you thoroughly explain the effect of Sulfanilamide and para-aminobenzoate on the growth of…
A: Sulfanilamide and para -aminobenzoate are use to treat bacterial infections.
Q: why the vibrio bacteria might survive better in colder temperatures? what part of their DNA or…
A: There are several stimulus-response pathway which help Vibrio to survive better in colder…
Q: Briefly explain, using the bacteria's response to environment, why the time =0 minutes is often not…
A: Bacterial growth has four different phases: Lag phase, log phase, stationary phase, and decline or…
Q: Can you thoroughly explain the effect of Benzoate at different pH levels on the growth of…
A: Bacteria are defined as the single celled organisms, that can further categorized into two types:…
Q: In stages of bacterial growth, this is the phase where the bacterium adjusts to the new environment…
A: There are many phases in the bacterial growth curve. These different phases together constitute…
Q: hy is nutrient broth considered as a universal growth medium for bacteria?
A: Nutrient Broth is a general-purpose medium for growing a wide range of fastidious and non-fastidious…
Q: Biofilm formation is known to increase the resistance of member bacteria to antibiotics. How does…
A: Microbes are mostly unicellular and exist as single cells.
Q: Using the disc diffusion table in the previous question, which bacterium was most resistant to the…
A: Gram-positive and gram-negative bacteria have various structures. Regularly, gram-negative creatures…
Q: How are quorum sensing and biofilms beneficial to the bacterial commmunity and how do they impact…
A: Quorum sensing (QS) is a process of cell-cell communication that allows certain cells to detect and…
Q: Why are gram-negative bacteria more resistant than gram-positive bacteria to the cytoplasmic target…
A: Antibiotics are a type of microbial substances which are active against bacterial cells and it is…
Q: Shang-Chi observed the following regarding a bacterium isolated from his newfound suit. All of them…
A: Antibiotics are antibiotics that are used to treat bacterial illnesses in humans and animals. They…
Q: Why yeast grow faster it growth medium is supplemented with erythromycin under aerobic growth…
A: Whenever any growth medium is inoculated with yeast, it is not just yeast that starts growing. It is…
Q: How might the bacterial growth curve change if a facultative anaerobe was first monitored for growth…
A: *Facultative anaerobes are bacteria which can grow in presence or absence of oxygen. * oxygen…
Q: What kind of enzymatic activities are required to grow the peptidoglycan cell wall?
A: The growing of peptidoglycan requires several enzymatic reactions which occur at the cytoplasm,…
Q: Structure on the bacterial surface used in locomotion
A: Microscopic, single celled organisms which are found in every environment in millions are known as…
Q: In what phase of the bacterial growth curve do cells die at rapid rates?
A: The bacterial growth is the complex process which involves anabolic and catabolic reactions which…
Q: a. What biochemical events in quorum sensing ensure that a biofilmcan function as a unit?b. Explain…
A: For several decades microbiologists thought that bacterial populations are collections of…
Q: What is an IgAase and why would a bacterial pathogenproduce one?
A: The bacteria that have the potential to cause diseases are called pathogenic bacteria.
Q: Name the phases of bacterial growth in which cells are the most Heterogeneous- Homogeneous-…
A: BACTERIAL GROWTH:- Bacteria when transferred to a known medium, the population undergoes a…
Q: E.coli was incubated with aeration in a nutrient medium containing two carbon sources provided one…
A: First of all, E. coli can utilize glucose and lactose both as a carbon source. Lactose is a…
Q: If the temperature of the incubator were to be increased from 35 to 45°C, how would this affect the…
A: The microbiology studies about both the diseases causing microbes and beneficiary microbes, about…
Q: What bacterial structural target would make an antibacterial drug selective for gram-negative…
A: The gram-negative bacteria don't retain the crystal violet stain that's why called gram-negative.
Q: Why do some organisms grow within the zones of growth inhibition caused by the antibiotics?
A: The Kirby-Bauer method is used to determine the sensitivity of microorganisms for a specific…
Q: Outline the regulatory mechanisms used by Bacillus subtilis to control endospore formation
A: Bacteria is a unicellular prokaryotic organism that cannot be seen through the naked eye. Some…
Q: To describe: The reasons for which passive transport is required for the bacteria.
A: In accordance with R. H. Whittaker's classification scheme, there are five main groupings of…
Q: How long does it take for E. coli to go from lag phase at time 0 to log phase to stationary phase to…
A: The unicellular organisms divide into two and so on replicating the genetic material as well as…
Q: What is the practical implication of exponential growth in bacteria?
A: When a broth culture is inoculated with a small amount inoculum, the population size of the bacteria…
Q: why is it significant that different types of bacteria have a veriety of distinct photo-pigments?
A: Electromagnetic radiation, or light, is a kind of energy that travels in waves. Radio waves,…
Q: What are the four basic stages of biofilm formation?
A: The biofilm is a thin mucous layer that is formed by a bacterial colony and a few other…
Q: There are many antibiotics that target the bacterial cell wall, but there are few antibiotics that…
A: The antibiotics are medicines that help stop infections caused by bacteria.They do this by killing…
Q: Why is bacterial culture useful to grow bacteria?
A:
Q: Which growth phase of bacteria is used for commercial producion of secondary metabolites and why?
A: Bacteria are unicellular and prokaryotic organisms that live in a wide variety of environments. It…
Besides autoinducer synthesis, what intracellular molecule
promotes biofilm formation in many bacteria?
Step by step
Solved in 2 steps
- Which bacterial culture (Lb. plantarum, P. acidilactici, or P. pentosaceus) was most effective against monocytogenes and Salmonella? Explain why. What are the limitations of using an agar disk diffusion assay to assess the effectiveness of an antiseptic, disinfectant, or, in this case, a biological control agent on the growth of bacteria of interest?How would someone design an experiment to test the role of azithromycin on quorum sensing in Pseudomonas aeruginosa?WHAT ONE ADAPTATION OF A MICROBE HAVE THAT ENABLES THEM TO SURVIVE LOW TEMP., HIGH PRESSURE. HIGH SALT, AND ACIDIC PH ENVIRONMENT? HOW DO THEY FIGHT AGAINST THESE CONDITIONS?
- Which molecules does E. coli not have to synthesize when grown in LB, compared to minimal media? Why would the presence of other (unknown) organisms and virusesconfuse studies on the growth a specific organism?Why is biofilm development in catheters (tubes that can be inserted into a body cavity, duct or vessel which allow drainage or injection of fluids) such a dangerous source of infection in hospitals?Using one of the graphs obtained with the medium II, name the different phases of the bacterial growth and indicate the starting and ending time points of these phases as well as the physiological characteristics of the bacteria during each phase