Q. No.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 |
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 |
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
Identify the incorrect statement regarding the cell-mediated immune response:
| 1. | It is mediated through the T lymphocytes |
| 2. | A large number of antibodies are secreted by activated T cytotoxic cells |
| 3. | It responds against cancer cells and viral infections |
| 4. | It is responsible for graft rejection |
Antibodies present in colostrum protects the newborn from certain diseases which are of:
| 1. | Ig G type | 2. | Ig A type |
| 3. | Ig D type | 4. | Ig E type |
Where do the T-lymphocytes develop the ability to recognize self from non-self antigens?
| 1. | plasma cells | 2. | spleen |
| 3. | thymus | 4. | liver |
| 1. | Bone marrow & Spleen | 2. | Bone marrow & Thyroid |
| 3. | Lymph nosed & Spleen | 4. | Bone marrow & thymus |
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