191
Question
Which one of the following belongs to retrovirus group?
Which one of the following belongs to retrovirus group?
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Solution
The correct option is D HIV
- A retrovirus is a type of RNA virus that inserts a copy of its genome into the DNA of a host cell that it invades, thus changing the genome of that cell.
- Such viruses are either single-stranded RNA (e.g. HIV) or double-stranded DNA (e.g. Hepatitis B virus) viruses.
- In most viruses, DNA is transcribed into RNA, and then RNA is translated into protein.
- However, retroviruses function differently, as 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 translational processes to express the genes carried by the virus. Hence, HIV belongs to the retrovirus group.
So, the correct answer is 'HIV'.
- A retrovirus is a type of RNA virus that inserts a copy of its genome into the DNA of a host cell that it invades, thus changing the genome of that cell.
- Such viruses are either single-stranded RNA (e.g. HIV) or double-stranded DNA (e.g. Hepatitis B virus) viruses.
- In most viruses, DNA is transcribed into RNA, and then RNA is translated into protein.
- However, retroviruses function differently, as 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 translational processes to express the genes carried by the virus. Hence, HIV belongs to the retrovirus group.
So, the correct answer is 'HIV'.
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