Read the following statements:
Statement I: AIDS is a disorder caused by HIV.
Statement II: HIV is a virus that damages immune system of its host.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Both Statement I and Statement II are correct.
AIDS stands for Acquired Immuno Deficiency Syndrome. It is caused by the Human Immuno deficiency Virus (HIV), a retrovirus that attacks the immune system of the person it infects.
Statement I: AIDS is a disorder caused by HIV. — True. AIDS is caused by the Human Immuno deficiency Virus.
Statement II: HIV is a virus that damages immune system of its host. — True. HIV enters macrophages and helper T-lymphocytes. The number of helper T-lymphocytes keeps falling, and the person becomes so immuno-deficient that even common infections cannot be fought off.
NCERT Extract:
AIDS – “The word AIDS stands for Acquired Immuno Deficiency Syndrome. This means deficiency of immune system, acquired during the lifetime of an individual indicating that it is not a congenital disease. ‘Syndrome’ means a group of symptoms. AIDS was first reported in 1981 and in the last twenty-five years or so, it has spread all over the world killing more than 25 million persons. AIDS is caused by the Human Immuno deficiency Virus (HIV), a member of a group of viruses called retrovirus, which have an envelope enclosing the RNA genome (Figure 7.6).”