Ncert Exercises & Solutions

Choose the correct option regarding Retrovirus:

1. a RNA virus that can synthesis DNA during infection
2. a DNA virus that synthesises RNA during infection
3. a ssDNA virus
4. a dsRNA virus

(1) A retrovirus is a single-stranded RNA virus that stores its nucleic acid in the form of mRNA genome (5'cap and 3’poly A tail).

In most viruses, DNA is transcribed into RNA, and then RNA is translated into protein.
However, in retroviruses their RNA is reverse-transcribed into DNA, which is integrated into the host cell's genome (when it becomes a provirus) and then undergoes the usual transcription and transtational process to express the genes carried by the virus,

i.e., RNA $\to$ DNA $\to$ RNA $\to$ Polypeptide.

NEET Information

courses

Company

Botany Questions

Chemistry Questions

Physics Questions

Zoology Questions