Questions

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. Transmission of HIV-infection generally occurs by (a) sexual contact with infected person, (b) by transfusion of contaminated blood and blood products, (c) by sharing infected needles as in the case of intravenous drug abusers and (d) from infected mother to her child through placenta.

The “Mission Mangalyaan”, also known as the Mars Orbiter Mission (MOM) was launched on 5 November 2013 by the Indian Space Research Organisation (ISRO). It was initially estimated to survive around six months, but it is still active and has captured the seasonal variations of the red planet for two Martian years.