A single protein strand folded into a stable,
functional domain represents
a. primary structure.
b. secondary structure.
c. tertiary structure.
d. quaternary structure.
e. most macromolecules.
Answer: c
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A number of viruses often include a similar set of symptoms when they cause an infectious disease state (fever, headache, fatigue, runny nose). Why would they all cause the same symptoms if they're different viruses?
A. They all possess the same basic virulence genes and molecules, so they all trigger the same responses. B. The symptoms are associated with the immune system's response, NOT the molecules from the pathogens themselves. Our responses against viruses are fairly similar, regardless of virus type, so the symptoms are similar. C. Most viruses infect the upper respiratory tract-this leads to the common set of symptoms listed above. Only a few viruses infect areas away from this region. D. Viruses specifically infect mainly epithelial membranes. As such, the virally induced reaction is similar in different areas of the body due to the same basic cell types (epithelial cells) being infected in each area.
Why does natural selection favor organisms that are benthic in estuaries? a. Changes in salinity
b. The constant movement of water. c. Changes in temperature. d. The high amount of nutrients.
In horses, there are four alleles at the A locus. Arranged in dominance sequence they are:A
(wild), ab (bay), ac (brown), ad (black) If you bred several bay mares whose sires were brown to a brown stallion whose sire was black, what are the genotypes of the parents; what type of offspring would be produced; and in what proportion? What will be an ideal response?
Compare and contrast the metabolic diversity of bacteria in one of the two groups below.A. Obligate anaerobes, facultative anaerobes, and aerobes
B. Autotrophic and heterotrophic bacteria
What will be an ideal response?