Developing a novel synthetic antimicrobial drug OFTEN begins with identifying an essential ________ in the target organisms and then making slight chemical modifications to the structure to ensure that it is ________ incorporated
a. biosynthetic precursor / competitively
b. biosynthetic precursor / noncompetitively
c. cofactor / competitively
d. cofactor / noncompetitively
Ans: a. biosynthetic precursor / competitively
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A person is infected with HIV. The individual is treated with several drugs, including azidothymidine (AZT). Which of the following is the most immediate effect of this drug?
A. It allows reverse transcriptase to proofread, and this will allow successful treatment with a vaccine. B. It does not allow the virus to make a DNA copy of its genome. C. It does not allow the viral genome to become integrated into the host genome. D. It inhibits formation of the capsid. E. It inhibits budding, as it is the reverse of the process by which HIV enters a cell.
Which of the following indicators of global
warming has (have) occurred? a. increase in the temperature of the lower atmosphere b. rise in sea level c. global surface temperatures are increasing at a faster rate d. melting of glaciers e. all of these
As part of the inflammatory response, _____ engulf and destroy invading bacteria
a. histamines b. dead skin cells c. mast cells d. macrophages e. antibodies
Hereditary information (with the exception of some viruses) is preserved in:
A) deoxyribonucleic acid. B) membrane structures. C) nuclei. D) polysaccharides. E) ribonucleic acid.