The antiviral drugs currently approved for use in HIV disease include ________.
A. protease inhibitors
B. nonnucleoside reverse transcriptase inhibitors
C. fusion inhibitors
D. nucleoside reverse transcriptase inhibitors
E. All of the choices are correct.
Answer: E
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Which of the following sequence pairs is a palindrome?
A. 5'?-GTTCAT-3?; 3?-CAAGTA-5? B. 5'?-GAATCG-3?; 3?-CTTAGC-5? C. 5'?-TCCGGA-3?; 3?-AGGCCT-5? D. 5'?-TCACGT-3?; 3?-TCACGT-5? E. None of the paired sequences are a palindrome.
Why would researchers want to have both genomic libraries and cDNA libraries from a particular
organism?
a. The genomic library is generally too big to be helpful; a cDNA library, being smaller, is much easier to study. b. A cDNA library will be the same in every cell; the genomic library tells researchers which genes are being expressed in individual cell types. c. The cDNA library helps us understand how retroviruses work; the genomic library does not. d. The cDNA library is a lot easier to clone than a genomic library. e. A genomic library will be the same in every cell; the cDNA library tells researchers which genes are being expressed in individual cell types.
In a stream that flows over limestone you would predict there would be higher
A) solute concentrations. B) temperatures. C) flows. D) biodiversity.
Some scientists predict that as atmospheric carbon dioxide levels increase, plant growth will also increase. What is the best explanation for this hypothesis?
A. Plants consume carbon dioxide from the atmosphere during photosynthesis. B. Plants release carbon dioxide into the atmosphere during photosynthesis. C. Plants consume carbon dioxide from the atmosphere during respiration. D. Plants release carbon dioxide into the atmosphere during respiration.