Test: AIDS (NCERT) - Grade 12 MCQ

HIV which causes AIDS is a retrovirus that contains single stranded RNA (SSRNA) as its genome

When HIV enters into the body of a person,it moves into macrophages where RNA genome of the virus replicates to form viral DNA with the help of enzyme reverse transcriptase. This viral DNA gets incorporated into cethe host cell's DNA and directs the infected cells to produce more viruses. The macrophages producing viruses, thus act as HIV enters into helper T-cells where it replicates and produces other virus. this is repeated so that the number of helper T-cells decreases in the body of the infected person. Dysentery (Bacillary) plaque and diphtheria are bacterial diseases, Ringworm appears during summer and rainy season. Widal test is used for confirmation of typhoid.

AIDS is caused by HIV. When HIV enters into helper T-cells, it replicates and produces other viruses that kill the helper T-cells. Thus the number of T-cells decrease in the body of the infected person and the person starts suffering from various infections.

Reverse transcription takes place during the formation of viral genomic RNA from DNA.

AIDS (Acquired immuno deficiency syndrome) is human immunodeficiency syndrome, a series of diseases caused by the human immunodeficiency virus or HIV. It may also be referred to as HIV disease or HIV infection.

By mosquitoes, ticks, or other insects. Through saliva, tears, or sweat. By hugging, shaking hands, sharing toilets, sharing dishes, or closed-mouth or “social” kissing with someone who has HIV. Through other sexual activities that don't involve the exchange of body fluids (for example, touching).

AIDS is diagnosed by ELISA (Enzyme-linked Immunosorbent Assay) test.

HIV virus consists of a protein capsid that encloses a couple of single-stranded RNA molecules and the enzyme Reverse transcriptase which would help the virus to convert to DNA in the host cell. There is an outer envelope covering the capsid which is made up of lipids in which are embedded the envelope proteins.

Every year, World AIDS Day is celebrated on December 1. This day is celebrated not only to spread awareness about the disease but also to remind the people and the governments that HIV has not gone away.

AIDS is caused by the human immunodeficiency virus (HIV), a member of a group of virus called retroviruses which have an envelope enclosing RNA genome.