Chapter 11 3 DNA Replication DNA replication is

Chapter 11. 3 DNA Replication

DNA replication is the molecular mechanism of inheritance There are the 4 types of nucleotides. 1. ) 2. ) 3. ) 4. ) A - Adenine T - Thymine C - Cytosine G - Guanine

Template Mechanism - Is like a negative and a photograph. Exact opposites of one another. If you know one side, you know the other. Watson & Crick suggested a DNA copying involved a template. This hypothesis was based on specific pairing rules of complementary bases.

DNA Copying or Replication 1. ) 2 strands of the double helix separate 2. ) Each strand is negative for producing a new complementary strand. 3. ) Nucleotides are copied one at a time across from the template. Base pairing rules are followed a daughter strand 4. )

Replication of the Double Helix There a dozen enzymes that aid in DNA replication. DNA Polymerases - are enzymes that make bonds between the 2 nucleotides. This process is fast and accurate! DNA Polymerase also Error Checks the newly laid down bases

Process of DNA replication 1. ) Begins at origins of replication 2. ) Opens up in both directions producing bubbles 3. ) The bubbles will eventually collide 4. ) This results in 2 new daughter DNA molecules DNA replication occurs before cell division. What phase of a cell? Interphase Daughter cells will have the same genetic information.

A T T A C G G T A A T G C C