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

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?
1. Their receptors are in CNS and CVS
2. They are generally taken by snorting and injection
3. They are CNS depressants 
4. They can be powerful sedatives and painkillers

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