NEET BIOLOGY

Detailed explanation-1: -Helicases are enzymes that are responsible for untwisting the double helix at the replication forks, separating the two strands and making them available to serve as templates for DNA replication.

Detailed explanation-2: -Helicases are enzymes that bind and may even remodel nucleic acid or nucleic acid protein complexes. There are DNA and RNA helicases. DNA helicases are essential during DNA replication because they separate double-stranded DNA into single strands allowing each strand to be copied.

Detailed explanation-3: -Answer and Explanation: DNA helicase is the enzyme that unwinds the DNA strand during replication. DNA helicases are enzymes that catalyze the unwinding of the two strands of DNA to provide the single-stranded DNA templates used in the processes of DNA replication, recombination, and transcription.

Detailed explanation-4: -The initiation of DNA replication occurs in two steps. First, a so-called initiator protein unwinds a short stretch of the DNA double helix. Then, a protein known as helicase attaches to and breaks apart the hydrogen bonds between the bases on the DNA strands, thereby pulling apart the two strands.