Which of the following describes the control sequences that hepatitis B viruses uses to direct transcription and processing of the viral mRNAs?
A) There are 5 promoters and 1 polyadenylation site.
B) There are 3 promoters and 2 polyadenylation sites.
C) There are 2 promoters and 2 polyadenylation sites.
D) There is only 1 promoter and 1 polyadenylation site. Different mRNAs are produced via alternative mRNA splicing.
E) The virus only produces a single mRNA which is the pregenomic mRNA.
Correct Answer:
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