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DNA Replication is the process by which a cell replicates its genetic material, DNA, prior to cell division. This vital process ensures that each new cell receives an exact copy of the parent cell's DNA. In DNA replication, the double helix structure of DNA is separated into two single strands, and an enzyme called helicase unwinds and unzips the hydrogen bonds between the complementary base pairs. This exposes the templates for new DNA synthesis. Another enzyme, primase, then adds short RNA primers to each template strand, which provide a starting point for the DNA polymerase enzyme to begin adding nucleotides. DNA polymerase moves along each template strand, adding complementary nucleotides one by one to form a new DNA strand. The process is highly accurate, with multiple proofreading and repair mechanisms in place to ensure that the newly synthesized DNA is an exact copy of the original. In the context of the hierarchy "Science/Life Science/Cellular Biology/Life Science Molecular Biology/Molecular Biology/DNA Replication", DNA replication falls under molecular biology, which is the study of biological molecules and their interactions. Life science molecular biology focuses on the molecular mechanisms that govern life processes, while cellular biology studies the structure and function of cells, including how they divide and grow. DNA replication is a fundamental process in cell division, making it an essential part of life science and cellular biology.