Which of the following characteristics are common to Poxviridae, Herpesviridae, and Hepadnaviridae?
A. double-stranded DNA in the virion
B. a complex capsid
C. the presence of an envelope
D. double-stranded DNA in the virion with a complex capsid
E. double-stranded DNA in the virion and the presence of an envelope
Answer: E
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The figure listed above is known as
a. a book lung. b. a tracheal system. c. gills. d. a lung micrograph. e. none of these.
Prokaryotes ____.
A. have a nucleus B. have complex, usually membrane-bound organelles C. always have cell walls D. are either bacteria or archaea E. always have flagella
Which of the following is not true about the G + C content percentages in DNA of organisms?
A. Similar G + C percentages only suggests relatedness if the two organisms are also alike phenotypically. B. Organisms with different G + C percentages have dissimilar base sequences. C. Organisms with similar G + C percentages have similar base sequences. D. All of the choices are correct.
What chemical causes death in many eukaryotes because it blocks cytochrome C oxidase?
A. Oxygen B. Iron C. Carbon monoxide D. Cyanide E. Copper