Place the different characteristics into the appropriate category of viral symmetry.
Labels
1. Regular polyhedron with 20 equilateral triangular faces and 12 vertices
2. Shaped like hollow tubes with protein walls
3. Pentamers (pentons) have five protomers; hexamers (hexons) possess six
4. Constructed from ring- or knob- shaped units called capsomers
5. Size of this type of capsid is influenced by its nucleic acid
6. Genome is wound in a spiral and lies within a groove formed by the protein subunits
7. Tobacco mosaic virus
