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Aqa A-Level Biology Papers Unofficial| Mark Scheme (2025)
aqa a-level biology papers
aqa a-level biology papers
are killer t-cells? - ANSWER - cytotoxic cells - bind to non-self antigens 2. how to killer t-cells work? - ANSWER 1. virus attaches to and enters host cell 2. viral DNA causes host cell to express viral antigens on its surface 3. killer t-cells attaches to viral antigens on infected cells 4. killer t-cells induces death of infected cell (apoptosis) 3. what is apoptosis? - ANSWER programmed cell death 4. how do killer t-cells destroy cancer? - ANSWER - cancerous = mutations - mu...
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