AIDS is caused by HIV. Among the following, which one is not a mode of transmission of HIV?

1. Transfusion of contaminated blood
2. Sharing the infected needles
3. Shaking hands with infected persons
4. Sexual contact with infected persons

‘Smack’ is a drug obtained from the

1. latex of Papaver somniferum       
2. leaves of Cannabis sativa
3. flowers of Dhatura
4. fruits of Erythroxyl coca

The substance produced by a cell in viral infection that can protect other cells from further infection is

1. serotonin     
2. colostrum   
3. interferon       
4. histamine

Transplantation of tissues/organs to save certain patients often fails due to rejection of such tissues/organs by the patient. Which type of immune response is responsible for such rejections?

1. Auto-immune response
2. Humoral immune response
3. Physiological immune response
4. Cell-mediated immune response

Antibodies present in colostrum, which protect the new born from certain diseases, is of

1. Ig G type                                 
2. Ig A type
3. Ig D type                                 
4. Ig E type

Tobacco consumption is known to stimulate secretion of adrenaline and noradrenaline. The component causing this could be:

1. Nicotine                                                   
2. Tannic acid
3. Curamin                                             
4. Catechin

Antivenom against snake poison contains
1. antigens                                             
2. antigen-antibody complexes
3. antibodies                                         
4. enzymes

Which of the following is not a lymphoid tissue?

1. Spleen         
2. Tonsils         
3. Pancreas               
4. Thymus

Which of the following glands is large-sized at birth but reduces in size with ageing?
1. Pineal                                 
2. Pituitary
3. Thymus                               
4. Thyroid

Haemozoin is a:

1. precursor of haemoglobin
2. toxin released from Streptococcus infected cells
3. toxin released from Plasmodium infected cells
4. toxin released from Haemophilus infected cells