One of the first drugs used to treat HIV was AZT, a nucleotide [thymine (T)] analog (T nucleotide (versus U) is an important hint). AZT was first developed within the context of treating cancer. What aspect of cell growth was AZT, in particular, expected to inhibit?
Ans: DNA polymerase
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Which of the following is (are) a sterilizing gas(es) that can be used on heat-sensitive materials?
A. Glutaraldehyde B. Ethylene oxide C. Chlorine gas D. Isopropanol
The manufacture of fertilizer is an energy-intensive process that uses ________ gas to reduce N2 to NH4+ at high temperature and pressure.
Fill in the blank(s) with the appropriate word(s).
The body system which functions to regulate the activities of other body systems by secreting chemical messengers called hormones is the
A. endocrine system. B. cardiovascular system. C. nervous system. D. respiratory system.
What distinguishes a mitochondrion from a hydrogenosome?
a. absence / presence of hydrogen (respectively) b. generation of ATP through respiration / fermentation (respectively) c. sensitivity level to oxygen d. all of the above