What step is required in the synthesis of ssDNA viruses that is not required in the synthesis of dsDNA viruses?

Which of the following does not initiate DNA synthesis?

a. A double-stranded DNA virus (Poxviridae)

b. A DNA virus with reverse transcriptase (Hepadnaviridae)

c. An RNA virus with reverse transcriptase (Retroviridae)

d. A single-stranded RNA virus (Togaviridae)

e. None of the above

Which of the following has never been found in a virus?

Which of the following is not a described type of animal virus?

Which of the following does not initiate DNA synthesis?

a. A double-stranded DNA virus (Poxviridae)

b. A DNA virus with reverse transcriptase (Hepadnaviridae)

c. An RNA virus with reverse transcriptase (Retroviridae)

d. A single-stranded RNA virus (Togaviridae)

e. None of the above