The viruses that infect the higher animals are known as zoophages.

The genetic material in viruses can be either DNA or RNA.

Necrosis is a form of cell injury, which results in the premature death of cells in the living tissue.

Embryonated eggs are used for culturing viruses.

Phytophages are plant viruses and cause great loss to agriculture by causing diseases.

Progressive Multifocal Leukoencephalopathy, a common complication of AIDS, is caused by JC virus. This virus gets activated in immunosupressed condition and lead to paralysis and death.

Viroids consist of a single-strand RNA molecule and lack a protective protein coat. They were discovered in the late 1960s.

Polioviruses have high affinity for nervous tissues. They multiply in the nerve cells and destroy them, leading to paralysis.

The first virus to be discovered was tobacco mosaic virus from a tobacco leaf by the Russian scientist Ivanovsky.

Poxviruses (DNA viruses) replicate within the cytoplasm. It is exception to the thumb rule that all DNA viruses replicate in the nucleus.

They all have segmented genomes.

Hepatitis A is transmitted through fecal-oral route.

Bunyavirus and Togavirus are transmitted exclusively by arthropods.

Potato spindle tuber disease is caused by Potato spindle tuber viriod (PSTVd).

The oral poliomyelitis vaccine is a live attenuated vaccine.

Four families have icosahedral symmetry. They are Adenoviridae, Papillomaviridae, Polyomaviridae and Astroviridae.

Vaccine-associated paralytic poliomyelitis (VAPP) is caused by type 3 virulent strain. Occasionally, the mutant strains revert to virulent strain and cause polio.

Coronaviridae family of enveloped viruses cause gastroenteritis.

This is the correct match. There is one family of partly double-stranded DNA virus: Hepadnaviridae; There is one family of single-stranded DNA virus that infect humans: Parvoviridae; Adenoviridae is a double-stranded DNA virus; Picronaviridae is a positive single-stranded RNA virus.

Since December 2013, an ongoing outbreak of Ebola in West Africa has infected at least 567 people in Guinea, Sierra Leone and Liberia, including 350 who died, according to the World Health Organisation. The outbreak appears to be the largest in history, surpassing the 425 cases that occurred in an Ebola outbreak in Uganda in 2000.