AP BIOLOGY

Detailed explanation-1: -Viroids are smaller than viruses, having free RNA as a genetic material and lack the protein coat that is found in viruses. Viruses, on the other hand, have either DNA or RNA as genetic material and a protein coat called capsid which protects the genetic material.

Detailed explanation-2: -First, viroids are the only infectious agents that lack protein components such as capsids. In general, the role of the viral capsid is the protection of the viral genome from degradation.

Detailed explanation-3: -Viroids are smaller in size than viruses. Viroids infect only plants whereas virus infects all types of organisms. In viroids, a protein coat is absent whereas in viruses a protein covering or a coat called a capsid is present around the genetic material.

Detailed explanation-4: -Viroids are pathogens that are smaller than viruses. It is a free RNA with a low molecular weight. It lacked the protein coat which is present in viruses and hence was termed viroid.

Detailed explanation-5: -The correct option is D absence of protein coat in viroid but present in virus. Virus : Virus is a non cellular and ultramicroscopic infectious agent that multiplies only inside the host.