Whic of the following diseases is caused by a protozoan?

1. Syphilis

2. Influenza

3. Babesiosis

4. Blastomycosis

Which of the following viruses is not transferred through semen of an infected male?

(1) Hepatitis-B virus

(2) Human immunodeficiency virus

(3) Chikungunya virus

(4) Ebola virus

The active form of Entamoeba histolytica feed upon

1. Erythrocytes, mucosa and submucosa of colon

2. Mucosa and submucosa of colon only

3. Food in intestine

4. Blood only

Which is the particular type of drug that is obtained from the plant whose one flowering branch is shown below?

1. Hallucinogen

2. Depressant

3. Stimulant

4. Pain-killer

At which stage of HIV infection does one usually show symptoms of AIDS?

1. Within 15 days of sexual contact with an infected person 

2. When the infected retro virus enters host cells

3. When HIV damages large number of helper T-Lymphocytes

4. When the viral DNA is produced by reverse transcriptase 

The cell-mediated immunity inside the human body is carried out by 

1. T-lymphocytes

2. B-lymphocytes

3. thrombocytes

4. erythrocytes

Motile zygote of Plasmodium occurs in

1. gut of female Anopheles

2. salivary glands of Anopheles

3. human RBCs

4. human liver

Widal test is carried out to test 

1. malaria

2. diabetes mellitus 

3. HIV/AIDS

4. typhoid fever

Common cold differs from pneumonia in that

1. pneumonia is a communicable disease, whereas the common cold is a nutritional

deficiency disease

2. pneumonia can be prevented by a live attenuated bacterial vaccine, whereas the

common cold has no effective vaccine

3. pneumonia is caused by a virus, while the common cold is caused by the bacterium

Haemophilus influenzae

4. pneumonia pathogen infects alveoli whereas the common cold affects nose and

respiratory passage but not the lungs

Which one of the following is not a property of cancerous cells, whereas the remaining

three are ?

1. They compete with normal cells for vital nutrients.

2. They do not remain confined in the area of formation 

3. They divide in an uncontrolled manner 

4. They show contact inhibition