| www.mindbites.com In 1953, Watson and Crick published their findings on the structure of DNA in the journal Nature. Knowing the structure of DNA allows us to understand how it works in the body. Professor Wolfe furhter explains their findings and how measurements from the X-ray defraction image helped define the structure of the DNA. These are the 0.34, 3.4, and 2.0 measurements that were observed in the image, but not understood. He also explains the bonding between the purines and pyrimidines. These are hydrogen bonds, formed in the middle of the double-helix. The sugar-phosphate chains are antiparallel. Finally, Professor Wolfe explains the four requirements of DNA, that it is informational, capable of replication, capable of communicating with cells, and capable of change, and how DNA meets all of these requirements. Taught by Professor George Wolfe, this lesson was selected from a broader, comprehensive course, Biology. This course and others are available from Thinkwell, Inc. The full course can be found at www.thinkwell.com The full course covers evolution, ecology, inorganic and organic chemistry, cell biology, respiration, molecular genetics, photosynthesis, biotechnology, cell reproduction, Mendelian genetics and mutation, population genetics and mutation, animal systems and homeostasis, evolution of life on earth, and plant systems and homeostasis. George Wolfe brings 30+ years of teaching and curriculum writing experience to Thinkwell Biology. His teaching ... |
