Question

Consider the following statements:

1. Adenoviruses have single-stranded DNA genomes whereas retroviruses have double-stranded DNA genomes.

2. Common cold is sometimes 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 1

Correct option is (b) 2 only

Adenoviruses are double-stranded DNA genomes. Retroviruses are single-stranded RNA animal viruses that employ a double-stranded DNA intermediate for replication. Option #1 is incorrect.

Common cold is a symptom of adenovirus. The retrovirus known as human immunodeficiency virus (HIV) causes acquired immunodeficiency syndrome (AIDS) in humans. Option #2 is correct.