3. a mental representation of something: she's got a good idea of the layout of the factory. 4. the characterization of something in general terms; concept: the idea of a square circle is self-contradictory. 5. an individual's conception of something: his idea of honesty is not the same as yours and mine. 6. the belief that something is the case: he has the idea that what he's doing is right. 7. a scheme, intention, plan, etc: here's my idea for the sales campaign. 8. a vague notion or indication; inkling: he had no idea of what life would be like in Africa.
Since DNA replication moves along the parent strand in the 5' to 3' direction, replication can occur very easily on the leading strand. As seen in, the nucleotides are added in the 5' to 3' direction. Triggered by RNA primase, which adds the first nucleotide to the nascent chain, the DNA polymerase simply sits near the replication fork, moving as the fork does, adding nucleotides one after the other, preserving the proper anti-parallel orientation.
DNA replication: DNA strand synthesized from 5' to 3' end. Starts at origin of replication which is a sequence that have a specific sequence of nucleotides which tells it where to begin. Proteins that initiate DNA replication recognize sequence, bind to it and separate the strands and open up replication bubble. Goes in both directions until the entire molecule is copied. At the end of each bubble is a replication fork, the region where the strands are being unwound.