What is the first step in dna replication?

The initial start in DNA replication is the unwinding of the pair DNA strands that make up the helix that is to be replicated. DNA Helicase untwists the helix at positions called replication origins. The replication origin produces a Y pattern and is named as a replication fork.

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the rocks are classified by the geological process they are formed by. the three main groups of rocks are igneous, metamorphic, and sedimentary. minerals are not they are classified under the chemical classes they are in. these groups include silicates, sulfates and carbonates.