Question
- What is the functional difference between B and T-cells?
- Name the source used to produce hepatitis-B vaccine using DNA technology.
| S.No. | B-lymphocytes | T-lymphocytes |
| 1. | B-cells form humoral or antibody-mediated immune system (AMIS). | T-cell form cell-mediated immune System (CMIS). |
| 2. | They defend against viruses and bacteria that enter the blood and lymph. | They defend against pathogens including protists and fungi that enter the cells. |
| 3. | They form plasma cells and memory cells by the division. | They form killer, helper and suppressor cells by the division of lymphoblasts. |
Hepatitis B vaccine is produced from surface antigens of transgenic yeast by DNA technology. The antigens represent whole protein vaccine.
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