Histamine is secreted by:

1.	Mast cells	2.	Fibroblast
3.	Histiocytes	4.	Plasma cells

Which of the following statements is not true for retroviruses?

Mast cells of connective tissue contain:

1. Heparin and histamine

2. Heparin and calcitonin

3. Serotonin and melanin

4. Vasopressin and relaxin

Cancer cells are more easily damaged by radiation than normal cells because they are:

Which one of the following is not correctly matched:

1. Culex pipiens – Filariasis

2. Aedes aegypti – Yellow fever

3. Anopheles culifaciens – Leishmaniasis

4. Glossina palpalis – Sleeping sickness

HIV infects:
1.  RBC
2.  T – helper cells
3.  B - cells
4.  Basophils

During injury, mast cells secrete:
1.  Histamine
2.  Heparin
3.  Prothrombin
4.  Antibodies

What is a vaccine:
1.  Treated bacteria, virus & protein
2.  Treated algae
3.  Treated fungi
4.  Treated plasmodium

During viral infection, the protein formed in host cells to resist is:

1. Interferons

2. Antitoxin

3. Antibody

4. Histone

Cancerous cells can easily be destroyed by radiation due to the:

1. Rapid cell division

2. Lack of nutrition

3. Fast mutation

4. Lack of oxygen