Q20. Consider the following statements:
- Adenoviruses have single-stranded DNA genomes whereas retroviruses have double-stranded DNA genomes.
- 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: (b)
- Adenoviruses are a family of widespread viruses that affect your brain system, intestines, urinary tract, eyes, and airways. Fever, coughing, sore throats, diarrhea, and pink eye are all frequently brought on by them. Children are more likely than adults to contract infections, but everyone can.
- The first claim is untrue. While retroviruses are made of single-stranded DNA, the adenovirus genome is a single linear molecule of double-stranded DNA.
- The second claim is true. Adenoviruses are the cause of the common cold. Retroviruses are the source of HIV. Because it has reverse transcriptase, HIV is considered a retrovirus. A member of the lentivirus family, it is a D-type virus
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