Bones that amplify sound reaching the eardrum are
indicated by
a. A and B.
b. A, B, and C.
c. B and C.
d. C and D.
e. none of these.
Answer: b
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Genomics analysis of recently isolated viruses indicate some viruses contain larger genomes than the some bacterial genomes
Indicate whether the statement is true or false.
Researchers would like to create HIV protease inhibitors that will not become ineffective due to viral strain resistance. One approach is to design a:
A. protease with no aspartate residues. B. protease inhibitor and treat all patients in a community simultaneously. C protease inhibitor that will not be mutated in the aspartate region. D. protease inhibitor that binds to highly conserved protease sequences. E. random screening program that tests hundreds of drug candidates.
The Na+ and K+ ion gradients across the plasma membrane are produced primarily by the
a. permeability of these ions across the lipid bilayer. b. ratio of these ions in the blood. c. action of the Na+-K+ pump. d. flow of these ions through voltage-gated channels.
Proteins that block the passage of RNA polymerase are called:
a. promoters b. activators c. operons d. enhancers e. repressors