The immune-deficiency becomes marked once the HIV starts destroying 
1. Macrophages
2. T helper cells
3. B lymphocytes
4. Natural killer cells 

The most standard HIV screening blood test:

The early screening test for HIV infection is :
1. ELISA
2. Western Blot
3. Culture of HIV
4, Detection of opportunistic infections

Opportunistic infections appear in AIDS patients when the HIV has destroyed :
1. Macrophages
2. T cytotoxic cells
3. T helper cells
4. B cells

AIDS is characterized by the presence of:

Study the diagram given and choose the incorrect statement :

1. A : retrovirus replicates outside the cell

2. B : viral DNA is produced by the host Reverse transcriptase 

3. C : viral DNA incorporates into the host genome

4. D : New viral DNA is produced by the infected cell

Consider the following statements:

Which of the above statements are true?

1. I and II only
2. I and III only
3. II and III only
4. I, II and III

Which of the following is correct regarding AIDS causative agent HIV?
(1) HIV is enveloped virus containing one molecule of single-stranded RNA and one molecule of reverse transcriptase

(2) HIV is enveloped virus that contains two identical molecules of single-stranded RNA and two molecules of reverse transcriptase

(3) HIV is not enveloped retrovirus

(4) HIV does not escape but attacks the acquired immune response

If you suspect major deficiency of antibodies in a person, to which of the following would you look for confirmatory evidence?

Which of the following viruses is not transferred through semen of an infected male?