The receptors for opioids are found in :
1. GIT and CNS
2. CNS and CVS
3. CVS and GIT
4. GIT and Urinary system

Which of the following drugs acts by interfering with the transport of the neurotransmitter Dopamine?
1. Morphine
2. Hashish
3. Cocaine
4. Atropine

Infection with Hemophilus influenza, especially in children, can cause:

1. Diptheria
2. SARS
3. Pneumonia
4. Dysentery

The secretion of antibodies by B lymphocytes provides:
1. Passive immunity 
2. Humoral immunity 
3. cell mediated immunity 
4. Innate immunity 

Cancer is more common in older because:
1. Their immune systems have degenerated
2. Secretion of certain hormones is decreased
3. Cell replacement is not adequate 
4. They accumulate more mutations

A normal gene that codes for proteins that help to regulate cell growth and differentiation and can, due to mutations or increased expression, lead to neoplastic transformation of cells, is called as:
1. Oncogene
2. Proto-oncogene
3. V-onc
4. Psuedogene

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

The major histocompatibility complex is a :
1. Series of complement-enhanced reactions to antigens
2. group of antigens, coded by a family of genes, on the surface of body cells 
3. form of autoimmunity 
4. the major cause of cancer 

Which of the following Fungi is not capable of causing ringworm infection in a man?

1. Microsporum
2. Trichophyton
3. Epidermophyton
4. Trichoderma

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