Which of the following is correct regarding AIDS causative agent HIV? (NEET 2016 Phase-2)
Answer: (B) HIV is enveloped virus that contains two identical molecules of single-stranded RNA and two molecules of reverse transcriptase. Answer: (b) HIV is enveloped virus that contains two identical molecules of single-stranded RNA and two molecules of reverse transcriptase Solution: HIV is an enveloped retrovirus carrying two identical single-stranded RNA molecules and two molecules of the enzyme reverse transcriptase, making (2) correct.
- A.HIV is enveloped virus containing one molecule of single-stranded RNA and one molecule of reverse transcriptase
- B.HIV is enveloped virus that contains two identical molecules of single-stranded RNA and two molecules of reverse transcriptase✓
- C.HIV is unenveloped retrovirus
- D.HIV does not escape but attacks the acquired immune response
Correct Answer
(B) HIV is enveloped virus that contains two identical molecules of single-stranded RNA and two molecules of reverse transcriptase
Solution & Explanation
Answer: (b) HIV is enveloped virus that contains two identical molecules of single-stranded RNA and two molecules of reverse transcriptase Solution: HIV is an enveloped retrovirus carrying two identical single-stranded RNA molecules and two molecules of the enzyme reverse transcriptase, making (2) correct. Option (1) understates the RNA/enzyme count, (3) is wrong because HIV is enveloped, and (4) misstates its pathology since HIV does evade and destroys helper T-cells of the immune system. NCERT Reference: Reproductive Health, p.47 — "the most discussed infection in the recent years, HIV leading to AIDS are some of the common STIs"