In mammals, histamine is secreted by:

1. fibroblasts

2. histocytes

3. lymphocytes

4. mast cells

Active immunity means:

Vaccine for tuberculosis is known as:

1. PAS vaccine

2. BCG vaccine

3. OPV

4. OPT

Alcoholism may lead to:

1. skin cancer

2. liver cirrhosis

3. viral disease

4. eye infections

Match the items of column I with column II and choose the correct option from the codes given below.

1. A-4 B-1 C-2 D-3

2. A-2 B-1 C-4 D-3

3. A-2 B-4 C-1 D-2

4. A-2 B-3 C-4 D-1

Which of the following immune responses is responsible for the rejection of kidney graft?

Colostrum, the yellowish fluid, secreted by the mother during the initial days of lactation is very essential to impart immunity to newborn infants because it contains:

Identify the correct pair representing the causative agent of typhoid fever and the confirmatory test for typhoid.

1. Salmonella typhi/Widal test

2. Plasmodium vivax/UTI test

3. Streptococcus pneumoniae/Widal test

4. Salmonella typhi/Anthrone test

The drug called 'Heroin' is synthesized by:
1. nitration of morphine
2. methylation of morphine
3. acetylation of morphine
4. glycosylation of morphine