nucleic acid replication english version

Post on 14-Jun-2015

367 Views

Category:

Education

0 Downloads

Preview:

Click to see full reader

DESCRIPTION

GCE A/L Genetics & Cellcycle

TRANSCRIPT

W.B.K.HETTIARACHCHIW.B.K.HETTIARACHCHI

END

karuhetti@yahoo.com

W.B.K.HETTIARACHCHIW.B.K.HETTIARACHCHI

ENDWhat is Replication?.What is Replication?.

In replication Two identical daughter DNA In replication Two identical daughter DNA molecules are made from a single DNA molecules are made from a single DNA

molecule.molecule.

This is an uneque feature in DNA.This is an uneque feature in DNA.

No other biological molecule do so.No other biological molecule do so.

W.B.K.HETTIARACHCHI

END

Two coplementary polynecleotide strands are joined by hydrogen bonds

To make a DNA molecule.

W.B.K.HETTIARACHCHI

END During replication the following steps are occurred.

1. DNA molecule unwind

2. The hydrogen bonds between complementary base pairs break

3. Two strands are separated from each other

4. Each single strand act as a template for a new complementary strand.

5. Complementary nucleotides are assembled alongside each strand.

6. Sugar-phosphate backbone is formed by phosphodiester bonds between adjacent nucleotides

7. Once this had occurred along the whole length of the each strand two identical molecules of DNA are formed.

W.B.K.HETTIARACHCHI

END

Hydrogen bonds break

Two strands separate

1 2

W.B.K.HETTIARACHCHI

END

Complementary bases assemble alongside each strand

W.B.K.HETTIARACHCHI

END Each strand make their complementary strand

W.B.K.HETTIARACHCHI

ENDTwo identical DNA molecules are

formed

W.B.K.HETTIARACHCHIW.B.K.HETTIARACHCHI

END

Let us animate the Let us animate the process of process of replicationreplication

W.B.K.HETTIARACHCHI

END

W.B.K.HETTIARACHCHI

END

H bonds break Two strands seperate

W.B.K.HETTIARACHCHI

END

Sugar phosphate backbone is made by joining the adjcent nucleotides ( DNA polymarase enzyme( ) )

Nucleotides with Complementary bases are assembled alongside each strands

W.B.K.HETTIARACHCHI

END

Two identical DNA molecules are formed

W.B.K.HETTIARACHCHIW.B.K.HETTIARACHCHI

END

THE END

karuhetti@yahoo.com

top related