. The separation of DNA strands moves outward from the origin via the action of , which untwists the double helix and makes each strand available for replication. The action of this enzyme generates additional coiling and strain just ahead of the direction it is moving, which is alleviated by the enzyme, . After the parental strands have separated, they must be stabilized. This is accomplished by .

Explanation:

DNA replication is the process in which DNA is replicated with the help of various enzymes and proteins..

Helicase is the enzyme which unwind the DNA strands, After unwinding, topoisomerase removes these twists. Single strand binding proteins  stabilize the single strands of DNA during replication.

label a cell membrane

label b cytoplasm

label c ribosomes

label d dna

the membrane forms the outside of the cell

cytoplasm is the liquid within

ribosomes are the components within that distribute rna

the dna is the genetic make-up