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.
Medical Definition of NOCICEPTIVE. 1. of a stimulus: painful, injurious. 2. : of, induced by, or responding to a nociceptive stimulusâused especially of receptors or protective reflexes.edical Definition of NOCICEPTIVE. 1. of a stimulus: painful, injurious. 2. : of, induced by, or responding to a nociceptive stimulusâused especially of receptors or protective reflexes.