PPT-17.3 DNA Double Helix An atomic model of a DNA molecule shows the double helix as the

Learning Goal Describe the double helix of DNA and the process of DNA replication DNA Base Pairs During the 1940s biologists determined that the bases in DNA had a specific relationship the amount of adenine A was equal to the amount of . Section 8.2: The Structure of DNA. 1. Objectives. SWBAT describe the interaction o the four nucleotides that make up DNA.. SWBAT describe the three-dimensional structure of DNA.. 2. Vocabulary – Section 8.2. DNA is composed of polynucleotide chains. The helical structure of . DNA. Formation of Nucleotides. Structure of polynucleotide polymer. Each base has its preferred . tautomeric. form. Purine. and . nanoscale. construction. material – engineers go beyond biology. Other technologies for making things at this scale : e-beam . lithograpy. , scanning-tunneling microscopy, chemical self-assembly. DNA or Protein?. Walter Sutton discovered . chromosomes . were made of . DNA and Protein. However, scientists were . NOT . sure which one (protein or DNA) was . the actual genetic material of the cell. THINK ABOUT IT. The DNA molecule must somehow specify how to assemble proteins, which are needed to regulate the various functions of each cell.. What kind of structure could serve this purpose without varying from cell to cell?. p. 26. 10/6. Monomer = Nucleotide. Polymer = Nucleic acid. Phosphate. Sugar (deoxyribose). Nitrogenous Base. DNA!!. THE BIG PICTURE. Cells. Cell Membrane. Molecule Movement. Carbs, Lipids, and Proteins. The helical structure of . DNA. Formation of Nucleotides. Structure of polynucleotide polymer. Each base has its preferred . tautomeric. form. Purine. and . Pyrimidine. Base . tautomers. ; are frequent sources of errors during DNA synthesis. 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?. This is a DNA strand. It is called a double helix.. Here is a second double helix.. DNA is made up of four ‘bases’:. Adenine (A). Thymine (T). Cytosine (C). Guanine (G). They form together to make strands of DNA,. College . of Education . Salahaddin. . University. Kirkuk . Road . Erbil-Iraq . Tel. .: . 07504095454. Research . Fellow. . Manchester Fungal Infection Group . The . University of Manchester . Institute . Film ActivityEducator MaterialsThe Double Helix OVERVIEW of the discovery of the molecular structure of DNA. Scientists collected and interpreted key evidence to determine that DNA molecules takethe construction. material – engineers go beyond biology. Other technologies for making things at this scale : e-beam . lithograpy. , scanning-tunneling microscopy, chemical self-assembly. Constructions we’ll talk about:. complementary. base . pairs.. Learning Goal . Describe the double helix of DNA.. DNA, Ratio of Bases. Scientists determined that . adenine is paired (1:1) with thymine.. guanine is paired (1:1) with cytosine. . α. helix. The planes of the rigid peptide bonds are parallel to the long axis of the helix, depicted here as a vertical rod. (b) Ball-and-stick model of a right handed . α. helix, showing the . intrachain.