Question

Ribovirus is a group of virus which contains
A) Double stranded DNA
B) Single stranded DNA
C) RNA
D) None of the above

Answer 1

Hint:Viruses are small microscopic infectious agents which replicate inside the host’s cell. They can infect all types of life forms.

Complete answer:
Let us analyse the options to find the correct answer.
>OptionA: Double stranded DNA is found only in DNA virus. Therefore, this is the incorrect option.
>Option B: Single stranded DNA is found only in DNA virus. Therefore, this is the incorrect option.
>Option C: Ribovirus is a virus group containing RNA as its genetic material. It lacks DNA intermediates in their entire replication cycle. The RNA present in this ribovirus can either be a single-stranded one or a double stranded one. Besides, it also contains RNA as its genetic material which later gets inserted into the host. Upon insertion, the RNA gets converted to mRNA in presence of RNA polymerase which further gets further translated into viral protein. Some of the RNA formed here can be used in the synthesis of a complementary strand in presence of enzyme replicate. Therefore, this is the correct option.
>Option D: As one of the options is correct, this is the incorrect option.

Thus, the correct option is (C) RNA.

Note:The characteristics of virus are,
>They have the ability to mutate.
>They do not carry out metabolism, instead depend on the host's cell metabolic machinery.
>They are acellular and have no cell organelles.
>They can reproduce only inside a host’s cell.