contain DNA OR RNA (never both) single or double strandedcontain a protein coat CAPSID
Viruses contain either DNA or RNA, but never both
Viruses contain either DNA or RNA, but never both. The genetic material within a virus can be single-stranded or double-stranded. This means that the DNA or RNA within the virus is composed of a single strand of nucleotides in the case of single-stranded viruses, or it can be formed by two complementary strands of nucleotides in the case of double-stranded viruses.
In addition to the genetic material, viruses also have a protein coat called a capsid. The capsid is made up of protein subunits called capsomeres, which come together to form the protective outer shell that surrounds and protects the viral genetic material. The capsid plays a crucial role in protecting the genetic material of the virus from damage and helping the virus to infect host cells.
The capsid can have different shapes and structures depending on the type of virus. Some viruses have a simple capsid structure, while others may have more complex shapes or even additional layers or structures surrounding the capsid. The capsid serves as the outermost layer of the virus and facilitates the attachment of the virus to host cells and the delivery of its genetic material into the host cell during the infection process.
Overall, viruses are extremely simple and small infectious agents that rely on host cells for replication and survival. Their genetic material can be either DNA or RNA, but never both, and is packaged within a protein capsid that protects the genetic material and facilitates infection.
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