1. | It is a function of lymphocytes |
2. | It retains memory of previous encounters with pathogens |
3. | It is non-specific and present since birth |
4. | It has the ability to distinguish between self and non-self |
1. | giving anti-venom injection to a person with snake bite |
2. | passage of IgG class of antibodies through placenta to the foetus and also of IgA class through colostrums |
3. | giving vaccine produced in recombinant yeast to prevent Hepatitis B |
4. | a person getting infected by a bacterium and developing antibodies against it |
1. | sexual contact with infected persons |
2. | transfusion of contaminated blood and blood products and sharing infected needles |
3. | placenta from the infected mother to her child |
4. | mere touch or physical contact |
1. | Oncogenic transformation | 2. | Contact inhibition |
3. | Metastasis | 4. | Carcinogenesis |