PPT-Chapter 9: DNA Replication

91 DNA Replication is Semiconservative DNA Replication is Semiconservative DNA Replication is Semiconservative Chapter 9 DNA Replication 92 DNA Replication in Prokaryotes Prokaryotic DNA is circular. WHAT YOU WILL LEARN. -process of DNA making copies . -role of enzymes in copying DNA. -leading and lagging strands in DNA replication. READING Q. ’. s . 1-LIST:. -the 3 phases of semi-conservative replication. 20.1 part 2. DNA replication. Earlier on in this unit we learned about mitosis or cell division.. In order for mitosis to occur and chromosomes to duplicate themselves, the DNA must copy itself exactly.. Models of DNA replication: Meselson-Stahl Experiment. DNA synthesis and elongation. DNA polymerases. Origin and initiation of DNA replication. Prokaryote/eukaryote models (circular/linear chromosomes). The function of DNA in the cells is to. preserve genetic information.. transfer genetic information to new cells as the strands of DNA are copied.. DNA Replication. In . DNA replication. ,. the strands in the original or parent DNA molecule separate to allow the synthesis of complementary DNA strands.. DNA REPLICATION. DNA IS COPIED. 1. DURING . S-phase. of . INTERPHASE. PREPARATION FOR CELL DIVISION. SEPARATION. 2. THE . STrAND. OF DNA IS . UNZIPPED. BY . HELICASE. 3. THE POINT OF SEPARATION IS CALLED THE . Dr. Kevin Ahern. Structure. Structure. Structure. One Strand of DNA. Structure. Introduction. Structure. Introduction. DNA Structure. DNA Forms. Semi-Conservative Replication. Discontinuous. Replication. Yadi. Zhou. 2013.12.05. RecA. protein. 38 . kiloDalton. Essential for the repair and maintenance of DNA. A . RecA. structural and functional homolog has been found in every . species. Homologous protein in . . Understanding DNA structure and replication is a prerequisite for understanding/using the principal tools of molecular biology . R. R. 0. R0. R0. 0. R0. R0. R. 0. R. RR. R0. 0. R0. 00. DNA: Structure & Replication. Something to think about... When a species . reproduces. , there is . genetic continuity . maintained from one generation to the next.. WHAT . is responsible for this continuity?. HOW . does this continuity happen?. In . their 1953 announcement of a double helix structure for DNA, Watson and Crick stated, . "It has not escaped our notice that the specific pairing we have postulated immediately suggests a possible copying mechanism for the genetic material.". Honors Biology. Mrs. Sims. Let’s Start with a Video. Please view the video before you start this presentation. . DNA Replication Animation. **This animation is created by McGraw Hill, the publisher of your textbook.. . REPLICATION – GENERAL PRINCIPLES. START. Must be ready . Must know where to start . FINISH. Must all finish . Must ensure that each piece of DNA is replicated only once . Therefore must know where to finish . . What is DNA?. DNA is a . Nucleic Acid in the nucleus. Polymer of . Nucleotides. Each nucleotide consists of. Deoxy. ribose (5-carbon sugar) . Phosphate group. a nitrogen-containing base. Four bases. Mitosis, Protein . Synthesis. Week 8. 9/29 . DNA Replication . 11.1. Obj. TSW demonstrate base pairing rules of DNA Replication by constructing a 2-D model of DNA with paper. . P. 68 NB. Replication Video.