Archive for July, 2010
Last Updated on Friday, 23 July 2010 09:55 Written by Administrator Friday, 23 July 2010 09:55
www.FreeScienceLectures.com First the DNA Wrapping is animated. The wrapping allows 6 feet of the long DNA molecule to be densely packed into the tiny nucleus of every cell. The process starts when DNA is wrapped around special protein molecules called histones. The combined loop of DNA and protein is called a nuclei zone. Next the nuclei zones are packed into a thread. The end result is fiber known as chromatin. This fiber is looped and coiled yet again leading to the familiar shapes known as chromosomes which can be seen in the nucleus of dividing cells. Chromosomes are not always present – they form around the time cells divide when the two copies of the cell’s DNA need to be separated. Using computer animation based on molecular research we are now able to see how DNA is actually copied in living cells. An assembly line of amazing biochemical machines are pulling apart the DNA double helix and cranking out a copy of each strand. This presentation was made by Drew Barry at The Walter and Eliza Hall Institute of Medical Research. — It’s Never too Late to Study www.FreeScienceLectures.com — Notice This video is copyright by its respectful owners. The website address on the video does not mean anything. —
Video Rating: 4 / 5
Tags: Biology, Molecular, Visualization | Posted under DNA Videos | 25 Comments
Last Updated on Wednesday, 21 July 2010 02:07 Written by Administrator Wednesday, 21 July 2010 02:07
Deoxyribonucleic Acid has four units: adenine, cytosine, guanine, and thymine. Originally created for DNA Interactive ( www.dnai.org ).
Video Rating: 5 / 5
Tags: Four, Units | Posted under DNA Videos | No Comments
Last Updated on Tuesday, 20 July 2010 08:53 Written by Administrator Tuesday, 20 July 2010 08:53
Natural Computing: DNA, Quantum Bits, and the Future of Smart Machines
- ISBN13: 9780393336832
- Condition: New
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Reports from the cutting edge, where physics and biology are changing the fundamental assumptions of computing. Computers built from DNA, bacteria, or foam. Robots that fix themselves on Mars. Bridges that report when they are aging. This is the bizarre and fascinating world of Natural Computing. Computer scientist and Scientific American’s “Puzzling Adventures” columnist Dennis Shasha here teams up with journalist Cathy Lazere to explore the outer reaches of computing. Drawing on interviews with fifteen leading scientists, the authors present an unexpected vision: the future of computing is a synthesis with nature. That vision will change not only computer science but also fields as disparate as finance, engineering, and medicine. Space engineers are at work designing machines that adapt to extreme weather and radiation. “Wetware” processing built on DNA or bacterial cells races closer to reality. One scientist’s “extended analog computer” measures answers instead of calculating them using ones and zeros. In lively, readable prose, Shasha and Lazere take readers on a tour of the future of smart machines. 50 illustrations
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Price: $ 10.34
Last Updated on Tuesday, 20 July 2010 08:53 Written by Administrator Tuesday, 20 July 2010 08:53
Question by Crazyboy: Which DNA double helix do you think would be harder to separate into two strands ?
Which DNA double helix do you think would be harder to separate into two strands: DNA composed predominantly of AT base pairs, or of GC base pairs? Why?
Best answer:
Give your answer to this question below!
Tags: Double, harder, Helix, into, separate, strands, think, would | Posted under DNA Questions | No Comments