DNA. Discovery The scientists Watson and Crick figured out the structure of DNA in 1953.
DNA Structure. What is DNA? In 1953 James Watson and Francis Crick developed a double helix model...
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Transcript of DNA Structure. What is DNA? In 1953 James Watson and Francis Crick developed a double helix model...
What is DNA?
In 1953 James Watson and Francis Crick developed a double helix model for DNA.
DNA consists of 2 strands that twist around each other.
DNA is made of nucleotides
DNA is made up of repeating building blocks called nucleotides
3 Parts of a Nucleotide A sugar A phosphate group One of 4 nitrogenous
bases (Adenine, Guanine, Cytosine or Thymine)
Complementary Pairing
The 2 strands are held together by hydrogen bonds between the nitrogen bases.
When the bases bond together they follow a specific pairing rule called complementary base pairing where A-T C-G
Rosalind Franklin
Watson and Crick built a DNA model that agreed with the X-ray images collected by Rosalind Franklin
James Watson, Francis Crick, and Maurice Wilkins received a Nobel Prize for the double-helix model of DNA in 1962, four years after Franklin's death at age 37 from ovarian cancer.
Videos
http://www.youtube.com/watch?v=qy8dk5iS1f0 (Basic DNA structure)
http://www.youtube.com/watch?v=sf0YXnAFBs8 (Watson Crick discovery)
http://www.pbs.org/wgbh/nova/teachers/body/personal-dna-testing.html- personal DNA testing
http://www.pbs.org/wgbh/nova/genome/media/2809_q056_14.html- DNA testing for individuals with a history of family illness
http://www.pbs.org/wgbh/nova/teachers/body/human-genome-project.html- Human Genome Project