Q. No.Identify a non-infectious disease amongst the following:
| 1. | Malaria | 2. | Hemophilia |
| 3. | AIDS | 4. | Hepatitis |
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 |
Match each item in Column I [Barriers in innate immunity] with one in Column II [Example] and select your answer from the codes given:
|
|
Column I |
|
Column II |
|
A. |
Physical |
a. |
Skin and mucus membranes |
|
B. |
Physiological |
b. |
PMNL |
|
C. |
Cellular |
c. |
Acid in stomach and saliva in mouth |
|
D. |
Cytokine |
d. |
Interferon |
Codes:
| Options: | A | B | C | D |
| 1. | a | b | c | d |
| 2. | d | b | c | a |
| 3. | a | c | b | d |
| 4. | d | c | b | a |
Which of the following cells can phagocytose microbes only in tissues?
| 1. | Neutrophil | 2. | Natural killer cells |
| 3. | Macrophages | 4. | Monocytes |
Interferons are secreted by:
| 1. | Virus infected cells | 2. | The viruses themselves |
| 3. | Natural killer cells | 4. | T helper cells |
What word correctly denotes an enhanced reaction of the body's immune system to an antigen which is related to one previously encountered?
| 1. | Booster | 2. | Primary |
| 3. | Anamnestic | 4. | Magnified |
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 |
The diagram shows the structure of an antibody molecule. Which number shows the antigen binding site?
| 1. | 1 | 2. | 3 |
| 3. | 4 | 4. | 5 |
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
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