Q. No.The CD8 T lymphocytes destroy their target cells by releasing a substance that affects:
1. cell membranes 2. lysosomes 3. ribosomes 4. DNA molecules
CD4 and CD8 proteins can be best described as:
| 1. | attachment proteins on the surfaces of helper-T and cytotoxic T-cells |
| 2. | different protein chains seen in IgG and IgM antibodies |
| 3. | proteins on microbes that identify them as foreign |
| 4. | the proteins that antigen-presenting cells display along with foreign antigens |
An antibody molecule has an antigen-binding site located in the:
| 1. | hinge region |
| 2. | disulfide bonds |
| 3. | constant region of the L chains |
| 4. | variable regions of the H and L chains |
An immune process where particles such as bacteria are targeted for destruction by an immune cell known as a phagocyte is called as:
| 1. | chemotaxis | 2. | opsonization |
| 3. | cloning | 4. | anergy |
A part of the immune system that enhances the ability of antibodies and phagocytic cells to clear microbes and damaged cells from an organism, promote inflammation, and attack the pathogen's cell membrane is called as:
| 1. | complement | 2. | interferon |
| 3. | lysozyme | 4. | mucus |
In malignant tumors, the cells proliferate, grow rapidly, and move to other parts of the body to form new tumors. This stage of the disease is called:
| 1. | metagenesis | 2. | metastasis |
| 3. | teratogenesis | 4. | mitosis |
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When an apparently healthy person is diagnosed as unhealthy by a psychiatrist, the reason could be that:
| 1. | the patient was not efficient at his work |
| 2. | the patient was not economically prosperous |
| 3. | the patient shows behavioural and social maladjustment |
| 4. | he does not take interest in sports |
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Which of the following are the reason(s) for Rheumatoid arthritis? Choose the correct option.
| i: | The ability to differentiate pathogens or foreign molecules from self-cells increases. |
| ii: | Body attacks self cells. |
| iii: | More antibodies are produced in the body. |
| iv: | The ability to differentiate pathogens or foreign molecules from self-cells is lost. |
| 1. | i and ii | 2. | ii and iv |
| 3. | iii and iv | 4. | i and iii |
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Which of the following does not define health in the WHO definition of health?
| 1. | Physical well being | 2. | Mental well being |
| 3. | Social well being | 4. | Absence of disease |
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Consider the following two statements:
| I: | Most parasites are pathogens. |
| II: | Pathogens have to adapt to life within the environment of the host. |
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. Only I is correct
4. Only II is correct
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