Proteins & Nucleic Acid

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7.2 DNA Replication

Helicase

an enzyme that untwists the double helix at the replication forks, separating the two parental strands and making them available as template strands

DNA Polymerase

An enzyme that catalyzes the elongation of new DNA at a replication fork by the addition of nucleotides to the existing chain.

Okazaki Fragments

Short fragments of DNA that are a result of the synthesis of the lagging strand during DNA replication

Phosphodiester bond

the type of bond that links the nucleotides in DNA or RNA. joins the phosphate group of one nucleotide to the hydroxyl group on the sugar of another nucleotide

RNA primase

an RNA polymerase that synthesises a short RNA primer sequence to initiate DNA replication

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