PPT-DNA Structure & Replication

Objectives To explain how instructions in DNA lead to different cells and result in cells being able to perform certain tasks in an organism Identify the building blocks and nitrogenous bases A T G C and U of nucleic acids . 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). Chapter . 7.2. Processing of Genetic Material. What is DNA Replication. The process by which the DNA within a cell makes exact copies of itself. Balance of speed and accuracy. Used for growth, repair and embryonic development. Learning Objectives. What happens during DNA replication?. How is a new polynucleotide strand formed?. Why is DNA replication known as ‘semi-conservative’?. Putting What We’ve Learnt So Far In To Context.... BIO…. LIFE….. THINK ABOUT THIS: . What do we do in our lifetime?. What are the major stages of our life?. What are the Major stages of physical development in our lives?. What would it look like. 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 . By. Dr. R. C. . Nath. ; Associate Professor. Department of Zoology. Govt. Degree College, DMR. .. Structure of a DNA molecule. `. It . has not escaped our notice that the specific pairing we have postulated immediately suggests a possible copying mechanism for the genetic material. 9.1 DNA Replication is Semiconservative. DNA Replication is Semiconservative. DNA Replication is Semiconservative. Chapter 9: DNA Replication . 9.2 DNA Replication in Prokaryotes. Prokaryotic DNA is circular. . 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?. (Chapters 6 and 3). . Presented by Dr. Laurie M. Erickson. Chair of the Department of Health Sciences. Blitstein Institute of Hebrew Theological College. Chicago, IL, USA.. 1. 6.1 Genome Size. Genome:. Unit 1 - Key Area 2. Part . 2: Replication of . DNA. Learning Intentions. To name the requirements of DNA replication.. Explain why DNA replication is described as being semi-conservative.. Describe the . 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..