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Apr 18, 2018 · Topology affects physical and biological properties of DNA and impacts fundamental cellular processes, such as gene expression, genome replication, chromosome structure and segregation.
- Paolo Bettotti, Valeria Visone, Lorenzo Lunelli, Lorenzo Lunelli, Giuseppe Perugino, Maria Ciaramell...
- 2018
In this section we examine the structure of the DNA molecule and explain in general terms how it is able to store hereditary information. A DNA Molecule Consists of Two Complementary Chains of Nucleotides
- Bruce Alberts, Alexander Johnson, Julian Lewis, Martin Raff, Keith Roberts, Peter Walter
- 2002
- 2002
Mar 13, 2018 · Change in conditions, however, can "denature" the DNA and cause these strands to separate. Adding strong bases, like NaOH, dramatically increases the pH, thus decreasing the hydrogen ion concentration of the solution and denaturing double-stranded DNA.
For Higher Biology, learn about DNA structure and how genetic instructions are stored, coded and transferred in living things.
Feb 22, 2017 · “The apple cells’ molecules are distinguished from each other by many factors, depending on variety, harvesting time and method. All apples have almost identical DNA sequences, but they differ from one variety to another,” says Luca Sebastiani, Professor of Horticultural Science at the Istituto di Scienze della Vita in Pisa, Italy.
DNA can mutate, allowing biological variation. The building blocks of DNA are nucleotides, small organic compounds consisting of one of four bases attached to a sugar (deoxyribose) and a phosphate. DNA in a chromosome is a single long chain of millions of connected nucleotides.
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The diagram below shows a tiny bit of a DNA double helix. Figure 12.1.1: The double helical structure of DNA. The backbone of DNA is based on a repeated pattern of a sugar group and a phosphate group. The full name of DNA, deoxyribonucleic acid, because of the presence of sugar - deoxyribose.
