1 / 17

Chapter 28 DNA-Life’s Code

Chapter 28 DNA-Life’s Code. Learn the parts of DNA Understand DNA replication Understand how DNA mutates Biotechnology. Bacterial Transformation Experiment. Fred Griffith 1928 Injected mice with bacteria Smooth :pneumonia bacteria Rough : harmless bacteria. Transforming Principle.

derek-powers
Télécharger la présentation

Chapter 28 DNA-Life’s Code

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 28DNA-Life’s Code Learn the parts of DNA Understand DNA replication Understand how DNA mutates Biotechnology

  2. Bacterial Transformation Experiment • Fred Griffith • 1928 • Injected mice with bacteria • Smooth:pneumonia bacteria • Rough: harmless bacteria

  3. Transforming Principle • Chemical that causes harmless bacteria to transform into pneumonia • Transforming principle = DNA

  4. DNA • Chemical of heredity • Deoxyribonucleic Acid • Sugar (Deoxyribose) • Phosphate • Nitrogen Base

  5. Nucleotide • 3 parts combined into one subunit • Join together to form an entire DNA

  6. 4 Nitrogen Bases • A: adenine • G: guanine • T: Thymine • C: Cytosine

  7. Base Pairing • Only certain bases can bond with one another • A bonds T • G bond C

  8. DNA Structure • Double Helix = twisted ladder • 2 chains: nucleotides joined together • Rungs: base – hydrogen bond – base • Sides: sugar and acid

  9. Replication of DNA • Copies of DNA chain made during Interphase http://www.pbs.org/wgbh/aso/tryit/dna/#

  10. Steps to Replication • An enzyme “unzips” the double helix • Unzips by breaking Hydrogen bonds • A new enzyme moves along the parent chain placing new nucleotides • Match base pairs; A-T; G-C • DNA molecule is a parent chain bonded to a new chain

More Related