Which one of the following Gram-positive bacteria is most likely to be the cause of a nosocomial infection?
A) Clostridium difficile
B) Staphylococcus aureus
C) Streptococcus pneumoniae
D) Streptococcus pyogenes
B) Staphylococcus aureus
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How would you label and separate the DNA of unknown methylotrophs in a sample?
A) Incubate the sample with 13C-methane. B) Hybridize the DNA to FISH probes. C) Use DGGE to separate the strands of DNA in the sample. D) Use T-RFLP to identify the methylotroph DNA in the sample.
Although it is said that the twentieth century was the Age of Physics, it is predicted that the twenty-first century will be the age of
A. chemistry. B. computers. C. microbial biodiversity. D. mathematics.
Which postulate of natural selection is deliberately enforced by dog breeders using artificial selection?
a. Individuals in a population vary. b. Survival and reproduction are not determined by chance. c. Traits are passed from parent to offspring. d. Some individuals fail to survive and reproduce.
Messenger RNA is formed by _____ of a gene on the DNA template strand.
A) replication B) transformation C) transcription D) translation