• Virusoids are viroid-like molecules, circular ssRNAs
  • The genome of virusoids consists of several hundred nucleotides and does not code for any proteins
  • They are dependent on the presence of plant virus replication for multiplication (hence ‘satellite’)
  • They are packaged into virus capsids (encapsidation) as passengers
  • They mainly attack plants
  • Virusoids are similar to viroids in size, structure and means of replication (Rolling circle replication)