Each person normally has one pair of sex chromosomes in each cell. Females have two X chromosomes, while males have one X and one Y chromosome. Early in embryonic development in females, one of the two X chromosomes is randomly and permanently inactivated in cells other than egg cells.
Lesson Summary. You should now understand that DNA helicase has a very important job to do. It is responsible for opening up our DNA to allow for replication as well as transcription of our DNA. A DNA helicase is an enzyme that functions by melting the hydrogen bonds that hold the DNA into the double helix structure.hat is, until they meet DNA helicase. In order for DNA polymerase (in replication) or RNA polymerase (in transcription) to see the nucleotide bases that are to be used as a template, these hydrogen bonds must be broken to expose the much-needed the nucleotide bases.
Describe the role of DNA helicase, DNA polymerase and DNA ligase in DNA replication? This is from my biology homework and it isnt covered in the book believe it or not, none of these words are in the glossary and i have no idea what i'm doing. Any help would be appreciated. Describe the role of DNA helicase, DNA polymerase and DNA ligase in DNA replication. Follow. Report Abuse.