DNA Replication: Core Mechanisms, Enzymes, and Genome Stability

DNA replication is the fundamental cellular process ensuring genetic continuity and accurate inheritance across generations. Without a perfect copying mechanism, life cannot sustain itself or adapt. This course provides a detailed, conceptual roadmap to understanding how cells precisely duplicate their entire genome, covering the historical evidence, the molecular machinery involved, and the regulatory steps that ensure high fidelity. What you'll learn: * Understand the semi-conservative mode of replication and analyze the foundational evidence, including the Meselson–Stahl experiment. * Master the function of every protein and enzyme involved in the replisome, such as polymerases, helicases, primases, and ligases. * Apply knowledge of polymerase activity to trace the synthesis of the leading and lagging strands, including Okazaki fragment processing. * Analyze the distinct processes of replication initiation and termination in both prokaryotic and eukaryotic systems. * Learn the basic concepts of proofreading and fundamental DNA repair mechanisms that actively maintain genome integrity and stability. We begin by defining the process and reviewing foundational experiments, then systematically explore the roles of the enzymatic machinery and accessory proteins. The course culminates in a comparative analysis of prokaryotic and eukaryotic systems and error management protocols. This course is designed for absolute beginners in molecular biology or students needing a rigorous, foundational review of genetics. No prior knowledge of biochemistry or genetics is required. Start reading today to unlock the secrets of genetic inheritance.