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Vancomycinis an antibiotic that has become critical for controlling penicillin-resistant bacteria. This large glycopeptide (molecularwt. = 1449) binds to cellwall precursors and interferes with peptidoglycansynthesis.The polymyxinsare a group of antibiotics that are particularly effective as atopical antibiotic against skin infections. These largepolypeptides (molecular wt. = 1202) can disrupt some bacterialmembranesby binding preferentially tolipid Amolecules. In the experiments below, different prokaryoticcells were grown in broth cultures in the presence orabsence of anantibiotic (either vancomycin or polymixin). After 1 hour, cellswere rinsed, and the percent of bacteria that survived wasdetermined.Graph Awas... Bacillus E.Coli Methanoge n(archaea)With Antibiotic----- 80%CellSurvival 20%CellSurvive 90%Cell SurviveWithout Antibiotic--- 100% CellSurvive 100%CellSurvive 100%Cell SurviveGraph B was... Bacillus E.Coli Methanoge n(archaea)With Antibiotic----- 30% CellSurvival 80%CellSurvive 100%Cell SurviveWithout Antibiotic--- 100% CellSurvive 100%CellSurvive 100%Cell SurviveQUESTION IS:Using the dataabove, predict which experiment (A or B) was done using vancomycin andwhich experiment was doneusing polymyxin, and explain yourrationale.NOTE: Bacillushas a Gram (+) type envelope; E.coli has a Gram (-) type envelopeandMethanobacteriumisan Archaea. (Hint: think about cell envelopestructure).
Cephalochordates and placental mammals both have microlecithal eggs, yet mammalian early development resembles that of birds more than that of amphioxus.
While hairless hamsters are mated with normal haired hamsters, about one-half the offspring are hairless and one-half are normal. When hairless hamsters are crossed with each other, ratio of normal-haired to hairless is 1:2. How do you account for re..
What is the inoculum of Candidatus Liberibacter asiaticus ? Which part of the adenosine triphosphate molecule is released when it is hydrolyzed to provide energy for biological reactions. How are mushrooms, bryophites, and ferns designed to facilitat..
List two types of macromolecules that have been partly digested by the time acid chyme moves into the intestine. Where did this digestion take place and what enzymes were involved.
What would be a potential cascading effect to the Everglades flora and fauna as a result of interspecific competition.
q1. give the common and scientific names of the three bird species that have had at least 90 percent of their genomes
At 20'C, in a 5.00 L container, a mixture of He, Ne, and Ar gases has a pressure of 2.00 atm. What is the partial pressure of the Ne, given that the He and the Ar each have a partial pressure of 0.25 atm?
Wastewater Treatment
A clerk in a health-food store tells you“natural” vitamin C extracts are better than synthetictablets of this vitamin. Given what you know about the structure of organic compounds, what would be yourresponse?
What is the cellular/molecular mechanism to make yeast chemically competent? Compare and contrast the molecular mechanisms of yeast and bacterial transformations.
The patient offers the subjective symptoms of paresthesias and pain in the lateral three and one-half digits of her right hand.
Describe your local soil structure: is it a mollisol? Ultimisol? Be specific about its characteristics and discuss the role of macroinvertebrates in soil formation and cycling, specifically in temperate hardwood forests.
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