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DNA polymerase - Definition


Definition


A DNA polymerase is a group of enzymes that participate in the replication of DNA, meaning the copying of chromosomes. When a DNA strand forms, a DNA polymerase intervenes to produce two molecules identical to the initial molecule. It is thus the DNA polymerase that is responsible for the synthesis of new DNA molecules. However, a DNA polymerase can only add nucleotides (molecules that constitute the foundations of DNA) to those that are already existing; it is not capable of creating a DNA strand itself without a starting point.
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