Question
Consider the following statements:
1. Adenoviruses have single-stranded DNA genomes whereas retroviruses have double-stranded DNA genomes.
2. Common cold is sometime caused by an adenovirus whereas AIDS is caused by a retrovirus.
Which of the statements given above is/are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Answer:
B
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Explanation:
Statement 1 is incorrect. Adenoviruses have double-stranded DNA genomes, not single-stranded DNA genomes.
Statement 2 is correct. The common cold is sometimes caused by adenoviruses, while AIDS (Acquired Immunodeficiency Syndrome) is caused by the human immunodeficiency virus (HIV), which is a retrovirus.
Therefore, only statement 2 is correct.