Current recommendations in the United States for treatment of MRSA are to use
A. any antibiotic other than methicillin.
B. no antibiotics to curb the development of resistance.
C. more than one antibiotic.
D. erythromycin and a second antibiotic.
E. no antibiotics to allow the immune system to function.
Answer: C
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Gene regulation by siRNA is ____ in eukaryotes and may have evolved originally as a ____
A. rare; way to regulate gene expression B. widespread; way to regulate gene expression C. rare; defense against mutations that may cause cancer D. widespread; defense against viruses E. rare; defense against viruses
Bacterial populations have been exposed to an antibiotic and have developed resistance to the
antibiotic over time. Would this be an example of stabilizing selection, directional selection, or disruptive selection? Explain your reasoning. What will be an ideal response?
Describe the molecular nature of mutation, as related to cancer, in a ras gene
What will be an ideal response?
At one end of each tRNA there is a sequence of three nucleotides known as the ___. This sequence is complementary to the bases on mRNA.
Fill in the blank(s) with the appropriate word(s).