A common cause of pneumonia in humans is:
1. | Streptococcus pyogenes | 2. | Hemophilus influenzae |
3. | Staphylococcus aureus | 4. | Rotavirus |
Rhinovirus does not affect:
1. | Lungs | 2. | Nose |
3. | Pharynx | 4. | Larynx |
Malignant tertian malaria is caused by Plasmodium:
1. | vivax | 2. | ovale |
3. | falciparum | 4. | malariae |
The mechanical carrier of the causative agent of amoebic dysentery is:
1. | A protozoan | 2. | House fly |
3. | Mosquito | 4. | Rodent |
Aedes aegypti is not a vector for:
1. | Dengue | 2. | Chikungunya |
3. | Japanese encephalitis | 4. | Yellow fever |
Which of the following is also sometimes called as mosquito fish?
1. | Bombay duck | 2. | Gambusia |
3. | Pacific salmon | 4. | Pomfret |
What is incorrect regarding innate immunity?
1. | It is present at the time of birth |
2. | Physiological barriers prevent microbial growth |
3. | Natural killers, a cellular barrier, are a type of monocyte |
4. | It is a non-specific type of defense |
Anamnestic response in acquired immunity is due to the fact that it is:
1. | characterized by memory | 2. | pathogen specific |
3. | huge in magnitude | 4. | due to lymphocytes |
B cells:
1. | Do not produce antibodies but help T cells produce them |
2. | Are pathogen specific but do not retain the memory of previous encounters |
3. | Lack ability to distinguish between self and non-self |
4. | Are involved in humoral immune response |
In an antibody molecule, an antigen binding site is located:
1. In the constant portion
2. At the C – terminus of a heavy chain
3. Between a light and a heavy chain
4. Between two heavy chains