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  • DNA Replication: Enzymes and the Role of DNA Polymerase
    DNA replication is performed by a complex machinery of enzymes and proteins, but the key player is DNA polymerase.

    Here's a breakdown:

    * DNA Polymerase: This is the primary enzyme responsible for synthesizing new DNA strands. It reads the existing DNA strand as a template and adds complementary nucleotides to build a new strand. There are different types of DNA polymerases, each with specific roles in the replication process.

    * Helicase: Unwinds the DNA double helix, separating the two strands to expose the nucleotide bases.

    * Single-strand Binding Proteins (SSBs): Stabilize the separated strands and prevent them from re-annealing.

    * Primase: Synthesizes short RNA primers, which provide a starting point for DNA polymerase.

    * Ligase: Joins the Okazaki fragments (short DNA segments synthesized on the lagging strand) into a continuous strand.

    * Topoisomerases: Relieve the torsional stress that builds up in the DNA molecule during unwinding.

    In summary, DNA replication is a coordinated effort involving numerous enzymes and proteins, but DNA polymerase is the central enzyme that builds the new DNA strands.

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