LIFE SCIENCE

Detailed explanation-1: -During DNA replication, DNA helicases unwind DNA at positions called origins where synthesis will be initiated. DNA helicase continues to unwind the DNA forming a structure called the replication fork, which is named for the forked appearance of the two strands of DNA as they are unzipped apart.

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: -Helicases are enzymes involved in the unzipping of the double-stranded DNA molecule at beginning of DNA replication. They do so by binding at DNA sequences called origins on DNA molecule then they break the hydrogen bonds between complementary base pairs causing the two strands of DNA molecule to unzip.

Detailed explanation-4: -Helicases unwind and separate the DNA strands to make way for the duplication machinery. Helicases chug along vast stretches of DNA without falling off, keeping pace with the DNA replication machinery that follows behind.