Activator proteins in eukaryotes usually have a domain that binds to DNA and other activation domains that often bind to _____
A) DNA polymerases
B) ATP
C) protein-based hormones
D) other regulatory proteins
E) tRNA
Answer: D
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Which of the following is true about membrane filters?
A. It can't be depended on to remove all viruses from liquids. B. It does not truly sterilize because it removes rather than kills microorganisms. C. It can be used only to remove organisms from liquids and it does not truly sterilize because it removes rather than kills microorganisms. D. It can be used only to remove organisms from liquids.
________________ include fungi and certain bacteria. These organisms feed on dead organic matter, and play a vital role in the cycling of sulfur and carbon
A. Primary producers B. Primary consumers C. Secondary consumers D. Tertiary consumers E. Decomposers
In the late nineteenth century, immigration from Ireland to the United States occurred in high numbers due to an infection of potatoes by
A. bacteria. B. viruses. C. fungi. D. amoeboid protozoa. E. water molds.
Because they are filter feeders, oysters are
most sensitive to pollution levels in their habitat and among the first organisms to suffer if pollution levels become too high. Oysters are an example of ___ species.
a. an endangered b. an endemic c. an indicator d. a threatened e. a conserved