Are viruses DNA or RNA or either?

​Virus. A virus is a small collection of genetic code, either DNA or RNA, surrounded by a protein coat. A virus cannot replicate alone. Viruses must infect cells and use components of the host cell to make copies of themselves.

Which of the following is not an RNA virus?

Retroviruses (Group VI) have a single-stranded RNA genome but, in general, are not considered RNA viruses because they use DNA intermediates to replicate.

How are viruses grouped or classified?

Viruses are classified into four groups based on shape: filamentous, isometric (or icosahedral), enveloped, and head and tail. Many viruses attach to their host cells to facilitate penetration of the cell membrane, allowing their replication inside the cell.

Which of the following viruses contain both DNA and RNA?

C) Leuko Virus: Leuko Virus is a retrovirus also referred to as the DNA-RNA virus. These viruses possess reverse transcriptase. This enzyme builds over the RNA genome and the process is called reverse transcription.

Are viruses unicellular?

Viruses are not classified as cells and therefore are neither unicellular nor multicellular organisms. Most people do not even classify viruses as “living” as they lack a metabolic system and are dependent on the host cells that they infect to reproduce.

Why are viruses not included in any system of classification?

Viruses:Viruses did not find a place in classification since they do not have a cell structure and are not true living beings. Viruses are noncellular, obligate, intracellular parasites.

What makes viruses different from each other?

Most notably, viruses differ from living organisms in that they cannot generate ATP. Viruses also do not possess the necessary machinery for translation, as mentioned above. They do not possess ribosomes and cannot independently form proteins from molecules of messenger RNA.

Do humans have both DNA and RNA?

Yes, humans have both DNA and RNA. DNA makes up the chromosomes within the nuclei of cells.