Consider the following statements:
1.Adenoviruses have single-stranded DNA genomes, whereas retroviruses have double-stranded DNA genomes.
2.The common cold is sometimes caused by an adenovirus, whereas AIDS is caused by a retrovirus.
Which of the statements given above is/are correct?
Adenovirus is a type of virus that has no envelope whereas retroviruses are characterized as enveloped viruses. Adenoviruses have double-stranded linear DNA and are associated with two major core proteins. A retrovirus is a virus that uses RNA as its genetic material. When a retrovirus infects a cell, it makes a DNA copy of its genome that is inserted into the DNA of the host cell. Hence, statement 1 is not correct. Adenoviruses are common viruses that cause a range of illnesses. They can cause cold-like symptoms, fever, sore throat, bronchitis, pneumonia, diarrhoea, and pink eye (conjunctivitis). Whereas, retroviruses can cause several human diseases such as some forms of cancer and AIDS. Hence, statement 2 is correct. Therefore, option (b) is the correct answer.