Consider the following statements:
- Adenoviruses have single-stranded DNA genomes whereas retroviruses have double-stranded DNA genomes.
- Common cold is sometime caused by an adenovirus whereas AIDS is caused by a retrovirus.
Which of the statements given above is/are correct?
[UPSC Civil Services Exam – 2021 Prelims]
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Answer: (b)
Explanation:
- Adenoviruses have double-stranded DNA genomes while Retroviruses have single-stranded DNA genomes. Hence, statement 1 is not correct.
- Common cold can sometimes be caused by adenoviruses while AIDS is caused by a retrovirus. Hence, statement 2 is correct.