Q. No.Which of the following is not an expected sign in a person suffering from pneumonia?
1.
High-grade fever with chills
2.
Sharp or stabbing chest pain during deep breaths
3.
Decreased rate of breathing
4.
Productive cough
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Why do cancer cells kill?
| 1. | They press upon the vital organs of the body |
| 2. | They deprive the normal cells of their nutrition |
| 3. | They release large amounts of toxins into the body |
| 4. | They lead to a heightened immune response against themselves |
Consider the given two statements:
| I: | Viral infections of human cells are inhibited only by human interferon. |
| II: | In contrast to antibodies, interferons are not virus-specific but host-specific. |
1. Both I and II are correct and II explains I.
2. Both I and II are correct but II does not explain I.
3. I is correct and II is incorrect.
4. Both I and II are incorrect.
Identify the incorrect statement regarding Typhoid fever in humans:
| 1. | Man is the only known reservoir of infection. |
| 2. | The pathogen is primarily transmitted through fecal oral route |
| 3. | Widal test measures agglutinating antibody levels against bacterial antigens. |
| 4. | No vaccine is available yet to prevent typhoid fever. |
CD8+ T cells, also known as "killer cells", are cytotoxic which means that:
| 1. | they determine if and how other parts of the immune system respond to a specific, perceived threat. |
| 2. | they are able to directly kill virus-infected cells as well as cancer cells. |
| 3. | they differentiate plasma cells that release chemicals to kill cancer cells. |
| 4. | provide the critical mechanism of tolerance. |
V[D]J recombination explains:
| 1. | the ability of the immune system to distinguish between self and non self |
| 2. | cooperativity between innate and adaptive immune responses |
| 3. | the genetic principle for generation of antibody diversity |
| 4. | hyperresponse of the immune system to allergens |
Identify the incorrect statement regarding Entamoeba histolytica:
| 1. | Cysts of Entamoeba can survive for up to a month in soil or for up to 45 minutes under fingernails. |
| 2. | Invasion of the intestinal lining results in bloody diarrhea. |
| 3. | Infection remains confined to the gastrointestinal tract. |
| 4. | Infections can sometimes last for years if there is no treatment. |
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Identify the correct statements regarding MHC I seen on the cells of vertebrate bodies:
| I: | They are found on the cell surface of all nucleated cells in the bodies of vertebrates, on platelets, but not on red blood cells. |
| II: | The function of the class I MHC is to display intracellular proteins to cytotoxic T cells (CTLs). |
| III: | Class I MHC itself can serve as an inhibitory ligand for natural killer cells (NKs). |
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
The most common source of HIV infection is:
1. Blood transfusion
2. Intravenous drug addiction
3. Homosexual contact
4. Heterosexual promiscuity
A drug, sometimes used to overcome the problem of alcoholism, is:
1. Flumazenil
2. Disulfiram
3. Desferroxime
4. Aspirin
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