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What unzips the double helix of DNA?
That happens to be the shape formed when the two strands are electrostatically bonded and is due to the arrangement of atoms, the number of bond- and lone-pairs of electrons, …the bond lengths and the number of covalent bonds they each have.
Maurice Wilkins and Rosalind Franklin, along with Ray Gosling, Alec Stokes, Herbert Wilson, and others at King's College in London, were integral to the discovery of DNA's… structure in 1953.
Each of the base pairs is formed with a purine and a pyrimidine. Even though the size of a purine differs from the size of a pyrimidine, the sum of these sizes is the same. In… other words, the size of a guanine base is roughly the same size as an adenine base, and a cytosine is roughly the same size as a thymine. Pairing of G to C and A to T therefore gives a uniform diameter.
Purines always bond with Pyrimidines.
The term double helix refers to the structure formed by double-stranded molecules of nucleic acids. Only DNA forms a double helix because RNA is only single-stranded.
James. D. Watson & Francis Crick
Its structure is two spirals interlaced; double meaning two, helix being the technical word for such a shape. DNA is known as the double helix because it coils up into… chromosomes and looks like a winding staircase.
Well, all DNA in humans form double helices. However, the genetic material for mitochondria does not take up an entire length of DNA. The gene for mitochondria will only take …up a very small site on the DNA molecule. U get my point? I sure hope this was useful. ----------------- All human DNA is double helical. Single-stranded DNA is only used in viruses as genetic material. Mitochondrial DNA is also very small and circular compared to chromosomes, which are extremely large and linear.
The enzyme Helicase unzips the DNA double helix
It refers to the DNA molecule that is shaped like a twisted ladder with the outsides (made of deoxyribose and phoshate) twisted.
First off - it is important to understand that a nucleotide (the monomer of DNA) is composed of 3 things: a sugar, a phosphate group, and a nitrogenous base. Next -… understand that the "backbone" of DNA is composed of the sugars and phosphates. That leaves you with nitrogenous bases. Hydrogen bonds form between the nitrogenous bases off opposite strands in the double helix. THIS is what holds the double helix together.
Think of it as a ladder, being twisted.
The base pairs are held together by hydrogen bonds.
Rosalind Franklin is credited with her substantial contributions to determining the double-helix structure of DNA via X-ray diffraction with the help of Maurice Wilkins. The… work of a number of other scientists was instrumental in understanding the important role of DNA, including that of James Watson and Francis Crick. However, it was Franklin's 'Photograph 51' that provided a real breakthrough in understanding its structure. The gem scientist James Watson along with Francis Crick discovered the double helical structure of the DNA. This was the landmark discovery, which will fascinate the generations to come, for thousands of years. Born in April 6 1928, in USA, now he is 86. May God bless him with long and healthy life.