Question
Biology Question on evolution
Which of the following hepatitis-causing virus contains DNA as nucleic acid?
A
(A) HAV
B
(B) HBV
C
(C) HDV
D
(D) HEV
Answer
(B) HBV
Explanation
Solution
Explanation:
Hepatitis B virus (HBV) is a member of the Hepadnaviridae family. It is a partially double-stranded DNA virus with a size of 3.2 kb. It has an incomplete positive strand, but the complete negative-strand has four overlapping genes, as mentioned subsequently.Hepatitis B virus (HBV), a major worldwide infectious and cancer-promoting agent contains a DNA genome of 3226 base pairs that replicates by a reverse transcriptase via an RNA intermediate.Hence, the correct option is (B).