Select two classes of HIV drugs, and fully explain how they work. Can they cure HIV?
What will be an ideal response?
Students may describe reverse transcriptase inhibitors, protease inhibitors, fusion inhibitors, or integrase inhibitors. Reverse transcriptase inhibitors prevent the conversion of viral RNA to DNA. Protease inhibitors block the processing of viral proteins needed to properly package the viruses. Fusion inhibitors block receptor sites on the host cell. Integrase inhibitors prevent viral DNA from integrating into host chromosomes.
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The shape of the bill on the bird in the accompanying figure is most likely the result of:
a. coevolution.
b. pollination.
c. asexual reproduction.
d. pseudocopulation.
e. inbreeding.
Natural selection results in ____
a. adaptation b. mutations c. new species d. genetic drift e. gene flow
Which of the following is the substance referred to as endotoxin
a. Hemolysis b. coagulase c. lipolysaccharide d. collagenase e. streptolysin f. staphylokinase
How are integral and peripheral proteins similar to each other?
a. They both interact with the hydrophobic core of the membrane. b. They both function at the membrane. c. They both consist of a mixture of polar and nonpolar amino acids. d. They are both found on the membrane surface.