The degree of pathogenicity of a microorganism is referred to as 

1. virulence 

2. prevalence 

3. severity

4. pathogenic efficacy

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

Adults of Wuchereria bancrofti attacks

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

The crystal of lead zirconate is a key component

1. electroencephalography

2. electrocardiography

3. magnetoencephalography

4. sonography