Although in vitro susceptibility testing is not reliable, which regimen of antibiotics is recom-mended for Brucella infections?
a. Penicillin and azithromycin
b. Ampicillin and gentamycin
c. Doxycycline and rifampin
d. Gentamycin and vancomycin
C
For initial therapy, doxycycline or tetracycline in combination with streptomycin or rifampin is recommended.
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Which of the following represents the true evolutionary history of a taxon?
A. monophyletic groups B. paraphyletic groups C. polyphyletic groups D. derived groups E. All of the of the answer options are correct.
A researcher identifies an abnormality in a protein that causes a particular inherited illness. To develop a treatment, it would be most helpful to know
A) which cells are affected and how to replace the protein's function in them. B) if this type of mutation occurs in all species. C) the other types of molecules that cause or contribute to the disease. D) how the mutation was caused.
The habitats of "birds of paradise" in New Guinea are on mountains separated by
a. areas of unsuitable land. b. fierce predators. c. man-made borders. d. the ocean. e. rivers and lakes.
Translation in bacterial and eukaryotic cells has many similarities, but there are also several key differences. Which of the following is one of those differences that is seen in eukaryotes?
A) Eukartyotic mRNA contains a Shine—Dalgarno sequence that increases the efficiency of translation. B) Eukaryotes only require one release factor that recognizes all three stop codons. C) Translation and transcription are coupled. D) Eukaryotes use the 5? G-cap and Poly-A-tail on their mRNAs to initiate translation. E) Eukaryotic ribosomes are smaller with fewer proteins and RNA molecules.