VIRUSES

1. Use reverse transcriptase

2. DNA viruses

2.1. Double stranded

2.1.1. Naked

2.1.1.1. Icosahedral

2.1.1.1.1. Adenoviridae

2.1.1.2. Circular

2.1.1.2.1. Papovaviridae

2.1.2. Enveloped

2.1.2.1. Icosahedral

2.1.2.1.1. Herpesviridae

2.1.2.1.2. Hepadnaviridae

2.1.3. Complex coats

2.1.3.1. Complex shape

2.1.3.1.1. Poxviridae

2.2. Single stranded

2.2.1. Naked

2.2.1.1. Icosahedral

2.2.1.1.1. Parvoviridae

3. RNA viruses

3.1. Double stranded

3.1.1. Naked

3.1.1.1. Icosahedral

3.1.1.1.1. Reoviridae

3.2. Single stranded

3.2.1. +ve sense

3.2.1.1. Enveloped

3.2.1.1.1. Icosahedral

3.2.1.1.2. Retrovirus

3.2.1.2. Naked

3.2.1.2.1. Icosahedral

3.2.2. -ve sense

3.2.2.1. Enveloped

3.2.2.1.1. Icosahedral

3.2.2.1.2. Helical