<P> DNA primase is an enzyme involved in the replication of DNA and is a type of DNA polymerase . Primase catalyzes the synthesis of a short RNA (or DNA in some organisms) segment called a primer complementary to a ssDNA template . Primase is of key importance in DNA replication because no known replicative DNA polymerases can initiate the synthesis of a DNA strand without an initial RNA or DNA primer (for temporary DNA elongation). After this elongation the RNA piece is removed by a 3' to 5' exonuclease and refilled with DNA . </P> <P> In bacteria, primase binds to the DNA helicase forming a complex called the primosome . Primase is activated by DNA helicase where it then synthesizes a short RNA primer approximately 11 ± 1 nucleotides long, to which new nucleotides can be added by DNA polymerase . </P>

Dna primase is an enzyme that catalyzes the reactions necessary to synthesize a molecule of
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