Hypernyms (to doodle is one way to...): draw (represent by making a drawing of, as with a pencil, chalk, etc. on a surface). Doodle entails doing...: delineate; describe; draw; line; trace (make a mark or lines on a surface).
DNA polymerases can only extend a DNA strand in a 5â² to 3â² direction, different mechanisms are used to copy the antiparallel strands of the double helix. In this way, the base on the old strand dictates which base appears on the new strand.
DNA Polymerase delta (Pol delta), the main polymerase in DNA replication, can only travel in one direction of the ladder, while having to copy both anti-parallel strands. Its dilemma is that it can only read and copy strands in the tail-to-head (called 3â to 5â) direction.