AP BIOLOGY

Detailed explanation-1: -Explanation: Helicases are enzymes involved in the unzipping of the double-stranded DNA molecule at beginning of DNA replication.

Detailed explanation-2: -The first step in DNA replication is to ‘unzip’ the double helix structure of the DNA? molecule. This is carried out by an enzyme? called helicase which breaks the hydrogen bonds? holding the complementary? bases? of DNA together (A with T, C with G).

Detailed explanation-3: -An enzyme called RNA polymerase travels along the DNA, unzipping its two strands. The molecule then copies one of the strands of DNA into a strand of RNA. This animation brings the process to life, showing three-dimensional representations of the molecules involved.

Detailed explanation-4: -This separated, independent structure with all base pairs unzipped is called ssDNA. The DNA unzipping and the DNA unwinding result in a structural transformation from dsDNA to ssDNA.