Which of the following would be most effective and practical for routine home disinfection of a toothbrush between uses?
A. 70% Isopropyl alcohol
B. Glutaraldehyde
C. Hydrogen peroxide
D. Bleach
Answer: C
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How does the organization of the bacterial genome differ from the organization of the eukaryotic genome?
A. The compaction of the eukaryotic genome involves structural maintenance of chromosome (SMC) proteins, and the compaction of the bacterial genome does not. B. Most bacterial chromosomes are circular and the eukaryotic chromosomes contained in the nucleus are not. C. Bacterial chromosomes are made up of RNA and eukaryotic chromosomes are made up of DNA. D. The eukaryotic genome is found on chromosomes and there are no chromosomes in bacterial cells. E. Eukaryotic chromosomes have to be tightly packed to fit into the nucleus, and bacterial chromosomes do not require tight packing to fit into the cell.
A Rossmann fold most likely is created when:
A. the ?-?-? motif is repeated within a polypeptide. B. the Greek key motif is repeated within a polypeptide. C. an ? helix facilitates the creation of a ?-?-? barrel structure. D. an ? helix prevents the creation of a ?-?-? barrel structure. E. a dimer contains subunits that are mirror images.
The oxygen (O2) produced by photosynthesis comes from carbon dioxide (CO2).
a. true b. false
In the disc diffusion susceptibility test, as the antimicrobic diffuses through the media and the concentration gradient is created, where is the highest level of the antimicrobic?
A) The highest level of antimicrobic is found closest to the disc. B) The highest levels of antimicrobic are found at the point on the plate furthest from the disc.