Which of the following is not essential part of virus?

Explanation

Not all viruses have envelope ,but a virus should have a nucleic acid and a protein coat always. Not all viruses have envelope ,but a virus should have a nucleic acid and a protein coat always. The complete, mature and infectious particle is known as virion. The virions are composed of a central core of nucleic acid, either DNA or RNA, which is also known as the genome and is surrounded by a protein coat, the capsid.In some animal viruses the nucleocapsid (nucleic acid and capsid) is covered by another membrane derived from the host cell, the envelope. Non enveloped viruses are known as naked virions.ntral core of nucleic acid, either DNA or RNA, which is also known as the genome and is surrounded by a protein coat, the capsid.In some animal viruses the nucleocapsid (nucleic acid and capsid) is covered by another membrane derived from the host cell, the envelope. Non enveloped viruses are known as naked virions.