What mechanism of antibiotic resistance does the NDM gene code for?
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What mechanism of antibiotic resistance does the NDM gene code
for?
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- The acquired antibiotic resistance genes encode what types of proteins that can inhibit the function of the antibiotic? list twoWhat does the two component signal transduction system allow cells to do? What are the two components and what do they do? How was this type of system used in Streptococcus pneumoniae transformation?Figure 5 shows the lac operon structure in Escherichia coli. a) Name structures P, Q and R. b) Name substance S. c) What is the enzyme encoded by gene I. Give its function. d) What will happen if substance S is absent in the medium?
- What are the effects of the following conditions on Lac operon of bacteria? Do not forget to mention about the role of repressor, activator, RNA polymerase in each case! A) Glucose is absent and lactose is present B) Glucose is present and lactose is present C) Glucose is present and lactose is absentThe lac operon contains the genes that the bacterium needs to be able to use lactose as a carbon source. What would happen to the regulation of the Lac operon if: a) a mutation has occurred in the Lac Z gene which results in the formation of no functional β-galactosidase b) a mutation has occurred in the CAP protein so that cAMP cannot bindWhat is the effect of a mutation in the allosteric site of the Lac Repressor protein? A) The Lac Operon would always be expressed whenever glucose is absent. B) The Lac Operon would never be expressed in any environment. C) The Lac Operon would be regulated normally. D) The Lac Operon would be never be expressed in lactose but would always be expressed in glucose.
- 1. a)how is it possible for such drugs to selectively kill bacterial cells and not our own cells? b)Provide an example of post-translational regulation of protein activity and explain the advantage of regulating each protein/process at the post-translational level instead of the transcriptional level.What is the definition of antibiotic resistance gene?In the presence of tryptophan, and a mutation in the allosteric domain that abolishes tryptophan binding______. a) the active repressor cannot bind trp), so operon gene transription is attenuated b) the inactive repressor cannot bind trpO, so operon gene transcription occurs] c) the active repressor binds trpP, so operon gene trasncription is repressed, the inducer cannot bind trpO, so gene transcription occurs d) the repressor binds to the corepressor, and an operon gene transcription occurs
- Why is formation of the replicative form of fX174 necessary inorder to make phage-specific mRNA?What is the toxin produced by E. coli O157:H7 that was encode by phage as a consequence of lysogenic conversion? Explain the medical importance.Under which of the following conditions will transcription of the lac operon occur?a) Lactose present/glucose presentb) Lactose present/glucose absentc) Lactose absent/glucose presentd) Lactose absent/glucose absente) a and b