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Molecular Biology focuses on the molecular mechanisms of genetic information flow within cells, including transcription, translation, replication, and repair. This field is closely linked to genetics as it involves understanding how genes function at the molecular level. In the context of immunology, molecular biology investigates the immune response at a molecular level, examining the interactions between immune cells and molecules, such as antibodies, cytokines, and major histocompatibility complexes. It is an essential tool for understanding the intricate workings of the immune system, providing insights into disease processes and potential therapeutic interventions. By studying molecular biology within the realm of immunology, scientists can elucidate the mechanisms underlying immune function, dysfunction, and disease, ultimately contributing to advancements in medical research, diagnostics, and treatments.