DNA Replication Notes:
DNA Replications is the process of making a new DNA molecule from an existing DNA
molecule.
Takes place in the nucleus during Interphase of the cell cycle.
Important because:
- it ensures the genetic code is passed on to each daughter cell formed in cell division
- it plays an important role in growth, repair and reproduction via mitosis and meiosis
PROCESS:
The process is catalysed by the enzyme, DNA polymerase
The double helix unwinds and the weak hydrogen bonds between the nitrogen bases
break.
This separates the 2 DNA strands
These exposed strands act as templates
Free DNA nucleotides in the nucleoplasm, bond with their complimentary bases on
the exposed strands of DNA
The new nucleotides added, form brand new strands
Once the nucleotides have linked up, they are joined together by DNA polymerase
Hydrogen bonds reform between the nitrogenous bases
There are now 2 identical strands of DNA
Lastly, the 2 daughter molecules each twist to form a double helix which then winds
itself around the histones, forming a chromosome.
by Unknown Author is licensed under
DNA Replications is the process of making a new DNA molecule from an existing DNA
molecule.
Takes place in the nucleus during Interphase of the cell cycle.
Important because:
- it ensures the genetic code is passed on to each daughter cell formed in cell division
- it plays an important role in growth, repair and reproduction via mitosis and meiosis
PROCESS:
The process is catalysed by the enzyme, DNA polymerase
The double helix unwinds and the weak hydrogen bonds between the nitrogen bases
break.
This separates the 2 DNA strands
These exposed strands act as templates
Free DNA nucleotides in the nucleoplasm, bond with their complimentary bases on
the exposed strands of DNA
The new nucleotides added, form brand new strands
Once the nucleotides have linked up, they are joined together by DNA polymerase
Hydrogen bonds reform between the nitrogenous bases
There are now 2 identical strands of DNA
Lastly, the 2 daughter molecules each twist to form a double helix which then winds
itself around the histones, forming a chromosome.
by Unknown Author is licensed under
