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

Proto-oncogenes are seen in :
1. Normal cells
2. Malignant cells
3. Virus infected cells 
4. Cells exposed to X-rays

What is incorrect regarding opioids?

The principal psychoactive principle present in the hemp plant, Cannabis sativa, is:
1. acetyl salicylic acid
2. diacetylmorphine
3. tetrahydrocannabinol
4. lysergic acid dimethylamide

DNA damage leading to neoplastic transformation can be brought about by ionizing radiations like :
1. UV rays 
2. Gamma rays 
3. Infrared waves
4. Radio waves

The skeletal structure shown in the given diagram shows the structure of :

Ringworm in humans can be caused by infection with all the following except:
1. Microsporum
2. Taenia
3. Trichophyton
4. Epidermophyton

Primary lymphatic organs serve as the site for:

1. antibody formation

2. lymph formation

3. lymphocytes to encounter and bind to antigens

4. lymphocyte formation and maturation

AIDS is characterized by the presence of:

1. Nosocomial infections

2. Iatrogenic infections

3. Opportunistic infections

4. Subclinical infections  

The receptors for the drug shown below are located in :

1. CNS and CVS

2. CVS and GIT

3. CNS and GIT

4. CNS and PNS