A lipid is a
a. polar hydrocarbon.
b. polar peptide.
c. nonpolar hydrocarbon.
d. nonpolar peptide.
e. coordinate covalent molecule.
C
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In a lichen, the photobiont usually receives
a. nutrients. b. protection from herbivory. c. aid in sexual reproduction. d. enhanced dispersal of offspring. e. shelter from radiation and desiccation.
How do plant and animal viruses differ in their mode of entry into host cells?
What will be an ideal response?
In E. coli, replication begins at which chromosome site?
A) The replication fork B) ter C) oriC D) TBP E) All of these
Which of the following statements about taste is false?
a. Taste receptors activate second messengers in the signal transduction process. b. Genetics play a role in determining what a person tastes. c. Taste receptors only detect chemicals that have been dissolved in saliva. d. Smell affects flavor because odors pass from the mouth to the nasal cavity. e. If taste receptors are damaged, they are incapable of regeneration