Consider the following statements: 1. Adenoviruses have single-stranded DNA genomes whereas retroviruses…

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?
  1. 1 only
  2. 2 only
  3. Both 1 and 2
  4. Neither 1 nor 2

Solution

Adenoviruses have double-stranded DNA, while retroviruses have single-stranded RNA (Statement 1 incorrect). Common cold can be caused by adenoviruses, and AIDS is caused by HIV — a retrovirus (Statement 2 correct).

Asked in: UPSC Prelims 2021

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