The unique antigenic determinants of the 90 serotypes of Streptococcus pneumoniae are found
A) on the cell-surface M proteins.
B) on the capsular polysaccharides.
C) in the bacterial cell wall.
D) in the inclusions in the periplasmic space.
Answer: B
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Two potential devices that eukaryotic cells use to regulate transcription are _____
A) DNA methylation and histone amplification. B) DNA amplification and histone methylation. C) DNA acetylation and methylation. D) DNA methylation and histone modification. E) histone amplification and DNA acetylation.
The human immunodeficiency virus (HIV) is an example of a retrovirus. In order to prevent incorporation of the viral DNA into the host genome, antiretroviral drugs could
A) target the viral enzyme reverse transcriptase. B) target the viral enzyme integrase. C) activate high levels of DNase in the cells to break down the viral DNA while it is still in the cytosol. D) all of the above E) none of the above
Germline and somatic gene therapy are used to treat human genetic diseases
a. True b. False
Microevolution is change in the __________ of a population. Fill in the blank(s) with the appropriate word(s)