https://www.khanacademy.org/science/telangana-class-8-biology/x9e658c120b0ca797:the-world-of-mico/x9e658c120b0ca797:vaccine/e/lo-5-3-vaccination 2026-03-24T23:41:07.080866137Z Vaccination, Uses of micro-organisms and Vaccination chart Let's solve some problems to better understand the concept of vaccination and its uses. Aakash Bagga exercise https://www.khanacademy.org/science/ka-biology-grade-12/x406cf103e0507862:in-in-human-health-and-disease/x406cf103e0507862:in-in-types-of-immunity-and-the-immune-system/e/antibodies-and-acquired-immunity 2026-04-07T23:17:37.123726494Z Antibodies and acquired immunity Antibody structure, antigen binding site, heavy and light chains, disulphide bonds, b and t lymphocytes, humoral immunity. exercise https://www.khanacademy.org/science/grade-12-biology-snc-aligned/xa8ba3a087f1f5288:disease-and-immunity/xa8ba3a087f1f5288:antibodies-and-vaccination/e/mechanisms-of-antibody-variability-during-b-cell-development 2026-04-08T01:19:59.083532605Z Immune system: Mechanisms of antibody variability Questions related to DNA and the immune system Jeff Collins, Alicia Cutillo exercise