Replication Forks and Origins of Replication. The first step in DNA replication is the separation of the two DNA strands that make up the helix that is to be copied. DNA Helicase untwists the helix at locations called replication origins.The replication origin forms a Y shape, and is called a replication fork. The replication fork moves down the DNA strand, usually from an internal location to the strand's end.he first step in DNA replication is the separation of the two DNA strands that make up the helix that is to be copied. DNA Helicase untwists the helix at locations called replication origins.
The definition of susceptive is likely to receive or receptive. An example of susceptive is a person who is sensitive to the moods of those around them. Medieval Latin susceptivus. 1  susceptible. 2  receptive.
stir1. 1  to move one's hand or an implement continuously or repeatedly through (a liquid or other substance) in order to cool, mix, agitate, dissolve, etc., any or all of the component parts: to stir one's coffee with a spoon. 2  to set in tremulous, fluttering, or irregular motion: A soft breeze stirred the leaves.