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Thursday, June 29, 2023

L2 Biology 2023 Purpose Of DNA Replication

DNA Replication is to make a copy of Deoxyribonucleic Acid (DNA) to be used in a New Cell, (Cell Division).

The DNA is Unwinded and unzipped by using an enzyme called Helicase. 

For DNA Replication to begin, The DNA needs to be unwinded and Unzipped by an enzyme called Helicase. The DNA will then be split into strands for the DNA Polymerase Enzyme. This needs a template strand So it reads both of the strands. the DNA polymerase then puts on the Complementary bases and temporarily attaches them. The DNA Leading strand is Finalised by the 3' 5' (Prime) rule and so it can easily attach. The Lagging DNA which also follows the Prime rule cant be put together the same so the Lagging DNA gets pulled apart and put back together using the Okazaki rule. This rule also allows more of the DNA to be properly fitted. After this The template and the DNA are glues together so they become a full DNA. The Original DNA becomes two Daughter DNAs.
The result of DNA replication is two Identical Daughter DNA Strands, Half from the Original Strand and Half was created during this. This is also called Semi Conservative Replication