Some viruses can be crystallized and their structures analyzed. one such virus is yellow mottle virus, which infects beans. this virus has a single-stranded rna genome containing about 6,300 nucleotides. its capsid is 25-30 nm in diameter and contains 180 identical capsomeres.
1) if the yellow mottle virus capsid has 20 facets, how many proteins form each facet?
a) 1
b) 5
c) 9
d) 20
e) 180