13Review When and where does DNA replication occur? What is the relationship between adenine and thymine called?What are the two enzymes involved in DNA replication?DNA replication occurs during the S or synthesis phase of cells, during mitosis and meiosis, in the nucleusA and T are complimentary base pairsHelicase, breaks hydrogen bonds and DNA polymerase, adds nucleotides and proofreads DNA
14ActivityIn pairs you are going to create your own DNA models.
15Pieces Sugar - Black pentagon Phosphate - White tube Nitrogenous bases -Adenine - Orange (5)Guanine - Yellow (4)Cytosine - Blue (4)Thymine - Green (5)Hydrogen bonds - White rods
16Procedure Create 18 nucleotides Put together a 9 rung ladder of DNA Be sure to have correct base pairingAfter having a complete DNA molecule create 18 more nucleotides
17DNA replication Begin to “unzip” DNA molecule from one end Add complimentary nucleotides to create two DNA molecules