Posts Tagged ‘Double’
Last Updated on Saturday, 30 July 2011 07:43 Written by Administrator Saturday, 30 July 2011 07:43
A simple and easy way.
Tags: Create, Double, Helix, model | Posted under DNA Videos | 7 Comments
Last Updated on Saturday, 30 July 2011 07:43 Written by Administrator Saturday, 30 July 2011 07:43
The structure of DNA, that Watson and Crick discovered, suggests how genetic information is passed on through DNA replication. Originally created for DNA Interactive ( www.dnai.org ). TRANSCRIPT The structure of DNA, that Watson and Crick discovered, suggests how genetic information is passed on. Before a cell divides, the double helix unwinds and the two strands of the DNA molecule in the nucleus separate. Each strand is then used as a template for the construction of new DNA molecules. The replication of DNA is simple in theory, but much more complicated in reality. The precise details have only recently been worked out. Take a look at the animation called “Mechanism of Replication” to see what actually happens at the molecular level.
Tags: Double, Helix, Replicating | Posted under DNA Videos | Comments Off
Last Updated on Saturday, 30 July 2011 07:43 Written by Administrator Saturday, 30 July 2011 07:43
Question by Nikki: What if the DNA double helix structure was changed?
Please help me with this question for my sister’s biology homework. I don’t even know where to begin answering it…
Suppose DNA didn’t have a double helix structure, and instead DNA was single stranded. Imagine that a cell with this single-stranded DNA was ready to begin cell division. How could a cell replicate single-stranded DNA so the daughter cells could recieve an extra copy of the genes present in the original cell?
Use your answer to explain why it is an advantage for DNA to have a double helix structure with paired nucleotides.
Best answer:
Answer by simplybob
the activated free nucleotides would pair with the complementary bases. The enzyme polymerase would join them up. i think…
Know better? Leave your own answer in the comments!
Last Updated on Saturday, 30 July 2011 07:43 Written by Administrator Saturday, 30 July 2011 07:43
Double Helix RNA/DNA (Part 1) Modern Ballet Choreographed by Peggy Willis Aarnio while she was still a Professor and Head of the Dance Program in the Texas Tech University Department of Theatre and Dance, in Lubbock, Texas, 1992. Now, a Professor Emeritus and Graduate Faculty Member at Texas Tech, Dr. Peggy Willis-Aarnio is Director of the Willis Conservatory where she instructs Academic Classical Ballet Lessons. Since 1994, Professor Emeritus Peggy Willis-Aarnio’s originals ballets have been seen in over 400 venues in North America, including Russia, Malta, North America, including The Bahamas, The Virgin Islands, Puerto Rico, Mexico, Costa Rica and Canada. For more information about Dr. Peggy Willis-Aarnio, visit the website: www.willisballet.com or to contact her: e-mail wiballet@msn.com. She loves to hear from all of her former students.