HIV is a member of a group of viruses called

1. bacteriophages

2. geminiviruses

3. lysogenic viruses

4. retroviruses

Typhoid fever is caused by a species of 

1. Streptococcus

2. Staphylococcus 

3. Salmonella

4. Mycobacterium 

The type of immunoglobulin present in the foetus are

An autoimmune disease is

Humoral immunity system is mediated by

1. B-cells

2. T-cells

3. NK-cell

4. plasma cells

LSD is

(1) hallucinogenic

(2) sedative

(3) stimulant

(4) tranquiliser

The main function of the white blood cell in the human intestine system is to 
1. Combat and destroy antigenic particles
2. produce antigens to combat antibodies
3. carry oxygen around the body 
4. transport antigens to B memory cells in the lymph nodes 

Blood cells that increase in number during allergic conditions like asthma are 

Leukaemia is caused by