The degree of pathogenicity of a microorganism is referred to as 

1. virulence 

2. prevalence 

3. severity

4. pathogenic efficacy

Which of the following is a psychosomatic disorder?

1. Psychosis

2. Neurosis

3. Hypochondria

4. Schizophrenia

The following hepatitis viruses are RNA except

1. hepatitis B virus

2. hepatitis A virus

3. hepatitis G virus

4. hepatitis E virus.

Cocaine is a stimulant, which may cause addiction. It is an alkaloid obtained from

1. Eucalyptus

2. Erythroxylum

3. Rauwolfia

4. Papaver

Which of the following is non-pathogenic bacteria of colon?

1. Escherichia coli

2. Balantidium coli

3. Entamoeba coli

4. Enterobius vermicularis

Which of the following is a component of cell mediated immunity?

1. B-cells

2. α-cells

3. T-cells

4. Both 1. and 2.

Which of the following is involved in allergic reaction ?

1. IgM

2. IgM and IgG

3. IgA

4. IgE

In Entamoeba histolytica, the presence of chromatid bodies is characteristic of

1. precystic stage

2. mature quadrinucleate stage

3. trophozoite stage

4. mature binucleate stage.

Adults of Wuchereria bancrofti attacks

1. exeretory system

2. nervous system 

3. digestive system

4. lymphatic system.

The sites of the first, second and third moulting of the Ascaris larva are respectively

1. soil, lung and intestine 

2. liver, stomach and intestine 

3. soil, alveoli and alveoli

4. soil, intestine and lung.