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प्रश्न
What is the mechanism by which the AIDS virus causes deficiency of immune system of the infected person?
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उत्तर
- After entering the body of an infected person, the AIDS virus enters the macrophage.
- Here, its RNA genome, with the help of the reverse transcriptase enzyme, forms viral DNA by replication, which enters the DNA in the cell and directs the formation of virus particles in the infected cells.
- The macrophage continues to produce the virus and acts as a production factory for HIV.
- HIV enters the helper T-lymphocyte and replicates itself and produces progeny viruses.
- The progeny viruses present in the blood attack other helper T-lymphocytes.
- This process is repeated again and again, as a result of which the number of T-lymphocytes in the body of the infected person keeps decreasing.
- The patient continuously suffers from fever and diarrhoea; weight keeps decreasing, and the patient's immunity becomes so low that he is unable to fight these types of infections.
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संबंधित प्रश्न
Name the group of genes that have been identified in normal cells that could lead to cancer. How do these genes cause cancer?
What are the various routes by which transmission of the human immuno deficiency virus takes place?
Expand the STD
Write the full form of the following as it occur in biology :
AIDS
Expand the following abbreviation:
HIV
Short answer question.
Give the name of causal organism of syphilis and write on its symptoms.
Write a short note on AIDS.
The organism which causes Gonorrhoea is ______.
AIDS is not transmitted by contact with a patient’s clothes.
AIDS-
Higher Order Thinking Skill (HOT)
A leading weekly magazine has recently published a survey analysis which says that number of AIDS patient in the country is increasing day by day. The report says that the awareness among the people about AIDS is still very poor. You are discussing the magazine report in your class and a team of your class decides to help people to fight against the dreadful disease.
- What problem you face when trying to educate the people in your village near by your school?
- How do you overcome the problem?
Value based question
How can informational efforts change people’s HIV knowledge and behaviour?
Write the preventive measures of STDs.
AIDS is ______.
Gonorrhoea is generally treated using ______.
Which of the following is correct regarding HIV, hepatitis B, gonorrhoea, trichomoniasis?
World AIDS day is ______.
A sexually transmitted disease symptomised by the development of chancre on the genitals is caused by the infection of ______.
Hepatitis-B, AIDS and genital herpes are the STDs that can be cured.
Human Immunodeficiency Virus (HIV) was first isolated by ______.
Which of the following sexually transmitted diseases is NOT completely curable?
STDs can be considered as self-invited diseases. Comment.
Give two examples of sexually transmitted diseases.
The following pairs represent diseases with their respective diagnostic tests.
Choose the pair that is correctly matched.
With the help of a flow chart, illustrate how an infected animal cell can survive while viruses are being replicated or released.
The following is well-known abbreviation, which have been used in this chapter. Expand to its full form:
NACO
