How does azidothymidine (AZT) fight AIDS?
A) It blocks the virus from entering the cell.
B) It targets the virus for destruction.
C) It blocks the enzyme that converts viral RNA to DNA.
D) It blocks the enzyme that assembles all of the parts into new viruses.
C
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Three critical amino acids in the active site of an enzyme are arginine, lysine, and histidine. Which of the following characteristics would you predict the substrate to possess in order to bind the active site of this enzyme?
A. relatively hydrophobic B. hydrophilic, with a negative charge C. hydrophilic, with a positive charge D. hydrophilic, but without a charge
Compare and contrast the production and transmission of a graded potential with those of an action
potential. What will be an ideal response?
When a nucleic acid undergoes hydrolysis, the resulting subunits are:a
fatty acids. b. amino acids. c. nucleotides. d. carotenoids. e. monosaccharides.
One of the primary functions of RNA molecules is to _____
A) transmit genetic information to offspring B) function in the synthesis of proteins C) make a copy of itself, thus ensuring genetic continuity D) act as a pattern or blueprint to form DNA