Answers

2014-10-09T21:43:47+05:30
Virus are nucleoprotein while viroids are RNA particles,In vrus nucleic acid can be RNA or DNA but in Viroids its only RNA.In Virus protein coat is present while in viroids its absent.Viruses have large size whereas viroids are smaller in size.virus infects all organism while viroids infects only plants
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2014-10-12T08:23:20+05:30
                     VIROIDS                                                VIRUSES
1. it is  RNA particle                                       1. it is nucleoprotein  particle.                     2.it forms only RNA                                     2.nucleic acid can be RNA or DNA
3.smaller in size                                                 3. larger in size
 4.protein coat is absent                                 4. present 
5.viroids are known to infect only plants.        4. infect all types of organisms.
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