Search results
Oct 7, 2024 · Hydrogen bonding plays a central role in the structural integrity and function of DNA, providing the subtle yet powerful forces that hold the two strands of the double helix together. These bonds occur between the nitrogenous bases, creating a bridge that maintains the helical structure while allowing the strands to separate when necessary, such as during replication and transcription.
- Definition
- An Overview of The Structure of DNA
- The Discovery of The Double Helix Structure of DNA
Double helix is the term used to describe the shape of our hereditary molecule, DNA. This instantly recognizable structure consists of two strands of DNA twisted around one another and connected in the center by hydrogen bonding. The hydrogen bonds form between nucleotides – the repeating unit of DNA and the language of the genetic code. The double...
Each strand of DNA is made of a series of repeating units called nucleotides. Hence, each strand of DNA is referred to as a polynucleotide. These nucleotides are formed of three components: 1. a five-carbon sugar (deoxyribose) 2. a phosphate group 3. a nitrogenous base The 4thcarbon of the deoxyribose sugar from one nucleotide forms a phosphodieste...
The discovery of the double helix structure of DNA is one of the most important and well-known scientific breakthroughs. The discovery was credited to James Watson, a biologist, and Francis Crick, a physicist, in the 1950s. They later won the Nobel Prizefor their research, along with Maurice Wilkins, who is often overlooked for his important role i...
Apr 24, 2024 · Types of DNA. The double helix model of DNA proposed by Watson and Crick is B-DNA which is right handed spiral and has 10 base pairs in one turn of helix. On the basis of number of base pairs in a turn, DNAs are of following forms: A-DNA: This type of DNA has 11 base pairs in a turn and right handed duplex. Its major grooves are very deep and ...
The three-dimensional structure of DNA—the double helix—arises from the chemical and structural features of its two polynucleotide chains. Because these two chains are held together by hydrogen bonding between the bases on the different strands, all the bases are on the inside of the double helix, and the sugar-phosphate backbones are on the outside (see Figure 4-3 ).
- Bruce Alberts, Alexander Johnson, Julian Lewis, Martin Raff, Keith Roberts, Peter Walter
- 2002
- 2002
Feb 7, 2020 · In these processes, the twisted DNA unwinds and opens to allow a copy of the DNA to be made. In DNA replication, the double helix unwinds and each separated strand is used to synthesize a new strand. As the new strands form, bases are paired together until two double-helix DNA molecules are formed from a single double-helix DNA molecule.
- Regina Bailey
DNA Double-Helix Structure. Nucleotides thus come together to form long polymeric chains. In DNA, two chains pair antiparallel to one another via hydrogen bonds that link the bases in pairs. Antiparallel means that the two strands run in opposite directions, with the 5′ carbon end of one strand facing the 3′ carbon end of its matching ...
People also ask
What is a double helix molecule?
What is the double helix model of DNA?
What is the distance between two strands of a double helix?
How do two paired chains form a double helical molecule?
What are complementary base pairs in the DNA double helix?
What is a double stranded DNA molecule?
Oct 31, 2023 · The twisting of the two strands around each other results in the formation of uniformly-spaced major and minor grooves bordered by the sugar-phosphate backbones of the two strands. Figure \(\PageIndex{1}\): Three representations of DNA’s double helical structure.: A is a spacefill model of DNA, where every atom is represented as a sphere.
