Viruses without nuclear envelope is called as?

Explanation

a. Icosahedral virus: Icosahedral viruses have a symmetrical structure that resembles a 20-sided polyhedron. This term refers to the shape of the capsid, not the presence or absence of a nuclear envelope. b. Naked virus: Naked viruses, also known as non-enveloped viruses, lack a lipid envelope. They only have a protein coat (capsid) surrounding their genetic material. This is the correct term for viruses without a nuclear envelope. c. Enveloped virus: Enveloped viruses have an additional lipid envelope surrounding their protein coat. This envelope is derived from the host cell membrane during the viral exit process. d. Bilayer virus: "Bilayer virus" is not a standard term used in virology. The structure of a virus's envelope, if present, is more accurately described as a lipid bilayer. Correct Answer: b. Naked virus Explanation: Naked viruses (non-enveloped viruses) lack a lipid envelope and only have a protein coat (capsid) around their genetic material. The absence of a nuclear envelope is a characteristic feature of naked viruses. Summary: The correct answer is b. Naked virus. This term accurately describes viruses that lack a nuclear envelope. Understanding whether a virus is enveloped or non-enveloped is essential for comprehending its structure, replication cycle, and interactions with host cells.