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- Gonorrhea is a sexually transmissible disease (STD) caused by the bacterium Neiserria gonorrhoeae. In the 1940s, penicillin was introduced as an antibiotic to treat gonorrhea. In particular, the drug inhibits the formation of new cell walls in dividing bacterial cells, making new cells vulnerable to the human body's defences. However, a new strain of Neiserria gonorrhoeae was found that is capable of breaking down penicillin, making this strain resistant. The emergence of this new strain has been associated with instances of non-strict compliance of certain patients on the use of penicillin as well as the improper administration of the drug. Based on the information given, formulate a strategy that could help control this new strain.Escherichia coli O157:H7 can cause serious food-borne illness. This strain of E. coli has acquired the ability to create a toxin normally produced in the bacterial species Shigella. Which of the following would not explain this ability found in E. coli?a) reproductionb) recombinationc) conjugationd) transductione) transformationWhat are two advantages of using mice as a model organism rather than yeast?
- Neisseria gonorrhoeae what is the size mm (bx x 0.3 x 0.000001), how many base pairs does it have, how many encoding segments or genes, how many Non-encoding segements or pseudogenes, and how many structural RNAs?One of the early results shows that the post-centrifugation pellet of encapsulated cells also contains EA1 and/or Sap. Why is this not proof that Bacillus anthracis cells have both an S-layer and a capsule simultaneously? I need help finding the answer in the article and explain in short answer link to article: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC106848/I read that vinyl chloride exposure is associated with an increased risk of a rare form of liver cancer (hepatic angiosarcoma), as well as brain and lung cancers, lymphoma, and leukemia. But my question is what gene(s) are being mutated by this type of taxic gas?
- Some people have a genetic predisposition for developing priondiseases. Examples are described in Table 25.6. In the case ofGerstmann-Straüssler-Scheinker disease, the age of onset istypically 30–50 years, and the duration of the disease (whichleads to death) is about 5 years. Suggest a possible explanationwhy someone can live for a relatively long time withoutsymptoms and then succumb to the disease in a relativelyshort time.Which of the following statements are true regarding the metabolome, the proteome, the genome, and the transcriptome? The number of genes found in the genome equals the number of different proteins that can be made within any give cell. The number of transcription products equals the number of proteins that can be made from these transcription products. The number of genes found in the genome equals the number of different transcription products that can be made within any given cell. The metabolome is encoded by the genome. None of the above.Which statement is true regarding a bacteriophage in the lysogenic cycle? 111 A) O The bacteriophage can exit the lysogenic state depending on the condition of host cell B) O While in this cycle, it would cause no harm to the host cell. O OAs the host cell divides, the bacteriophage genome will be present in all of the host cell's progeny. |D) OIt would become a prophage. E) O All are true statements.
- What are the advantages and disadvantages to bacteriophages of the lytic and lysogenic reproductive strategies?Explain the mechanism/s through which molecules such as cyanide and rotenone can exert a cytotoxic effect on eukaryotic cells after instances of exposure. In addition describe if you would expect to observe the same phenotype in anaerobic cells or prokaryotic cells after cyanide exposure.b. Neurospora has an arginine amino acid synthesis pathway shown below: ornithine citrulline arginine NH H2N H2N OH H2N HO HO NH2 NH2 ÑH2 Enzyme A Enzyme B Enzyme C ↑ ↑ Gene A Gene B Gene C Suppose I have a neurospora strain that has a mutation such that it will not grow unless I supplement the media (food) with arginine (but not with citrulline or ornithine). What gene is mutated? Explain your reasoning. C. Suppose I take the strain above that only grows with arginine supplements and cross it to a different mutant Neurospora strain that grows with arginine and citrulline supplements but not ornithine supplements. Assming genes A, B and C are unlinked and there is only one mutation per strain: i) What percentage of the progeny will grow on ornithine? ii) What percentage on citrulline? iii) What percentage on arginine? Show your work for i), ii) and iii). |