Question

A virion is known as
A. With protein coat virus
B. Enucleated virus
C. Prions
D. Virus with DNA or RNA enclosed in a capsule

Answer 1

Hint: It is an infectious particle that is capable of transmitting the nucleic material from itself to the host cells. While viroids consist of only a short strand of circular RNA which are capable of self-replication, the prions are just infectious proteins. They both differ from virions in structural composition.

Complete answer:
A virion is an entire virus particle that consists of two shells:
An outer protein shell called a capsid
An inner core is of nucleic acid.
The capsid helps in providing specificity to the virus and the core provides infectivity. Further, when this virion particle infects the host cell, it replicates to form virus particles inside the infected host. The virion particles may infect the healthy host cells in their surroundings because their infectivity is much more than the viruses.
A virion is an infectious form of the virus. Virion contains protein coat surrounded genetic material. It is a functional virus. It can be said that a virus particle outside the host cell is called a virion. It can be noted that a virion even has the capacity to infecting the living tissue.
On the other hand, the viruses which are without protein coat are called viroids which contain only RNA as genetic material.

Thus, the correct answer is 'with protein coat virus' i.e. option (A).

Note: The virion is an extracellular form of a virus with DNA or RNA enclosed protein coat outside the cell. It is the complete virus particle that contains two coats. One is the protein coat and the other one is the nucleic acid coat.