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

• A. A virus containing double strand DNA.
• B. A virus containing single strand DNA.
• C. A virus containing single strand DNA and single strand RNA.
• D. A virus containing single strand RNA.
• E. A virus containing double strand RNA.

Answer: (C)

Verified step by step guidance

1. Understand the basic types of nucleic acids found in viruses: DNA and RNA, which can be single-stranded (ss) or double-stranded (ds).
2. Recognize that animal viruses can have genomes made of either DNA or RNA, and these can be either single-stranded or double-stranded.
3. Review the common types of animal viruses: dsDNA, ssDNA, dsRNA, and ssRNA. These are the typical configurations found in nature.
4. Identify the option that does not fit the common types of animal viruses. In this case, a virus containing both single-stranded DNA and single-stranded RNA is not a typical or described type of animal virus.
5. Conclude that the correct answer is the option that describes a virus type not typically found or described in scientific literature.