Each nucleotide in DNA and RNA has an aromatic base. What is the principal force that keeps the bases in a polymer from interacting with water?
(a) hydrophobic interactions
(b) hydrogen bonds
(c) covalent bonds
(d) van der Waals interactions
(a)
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What biome borders on boreal forest?
a. savanna c. tundra b. taiga d. chaparral
The result of X inactivation is ____________________ between the sexes. Fill in the blank(s) with the appropriate word(s)
Viral proteins can damage host cells by:
a. increasing the rate of fermentation within the host. b. producing endotoxins. c. causing a decline in coordination and increased irritability. d. preventing transcription of viral nucleic acids. e. overwhelming the host cell with a large number of viruses.
Generally, the homicide rate is higher in cities with large populations than in smaller municipalities. How, then, would you characterize homicides as population-controlling factors?
A) They are unlike parasites. B) They are unlike famine. C) They are like infectious diseases. D) They are like floods.