What is the role of Helicase?
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DNA helicase contineous to unwind the DNA forming structure called the replication fork, which is named forked apperance of the two strands of DNA as they are unzipped apart.
the process of breaking the hydrogen bonds between the nucleotide base pair in doubled -stranded DNA require energy.
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Learn about DNA helicase and the role it plays in starting the process of DNA replication.This lesson also covers information on how DNA helicase functions. After reading, you can test your understanding by taking the quiz.
Gaining Access to Our DNA
Ever wonder how a copy of our DNA ended up in every cell in our bodies? Well, this process starts with a process known as DNA replication. In order for replication to begin, the replication machinery must have access to the nucleotides that are encoded in the DNA strands. This access is granted through the enzyme known as DNA helicase.
The Function of DNA Helicase
Imagine for a minute that you are shopping and interested in a new pair of jeans. You want to try the jeans on, so you need to figure out how to get into them. The first thing you notice is the button. Opening the button gives a little room, but not enough for you to get into the jeans. You then pull down the zipper, which opens the jeans up even more, giving you the space you need to get into them.
This is very similar to the role that DNA helicase plays in DNA replication: DNA helicase is the zipper. It unzips our DNA strands to allow space for attachment and to expose the nucleotides that are used as a template during DNA replication and transcription.
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