It also contains sugar ribose instead of deoxyribose and nucleotide uracil instead of thymine.RNA is a nucleotide polymer with a single strand. The second nucleic acid found in the cells is ribonucleic acid (RNA).The two strands wrap around each other in a shape termed the ‘double helix’ because of the bonding.Given below is the diagram for the Watson-Crick Structure Of DNA Adenine is always linked with thymine, while cytosine is always linked with guanine.Hydrogen bonds connect the bases of strands.Each strand is made up of nucleotides that are covalently linked by their phosphate groups and deoxyribose sugars.Two strands of DNA make up a DNA molecule.There are two purines (adenine and guanine) and two pyrimidines in the DNA (cytosine and thymine).A nitrogenous base, a five-carbon sugar (deoxyribose), and a phosphate group are found in each nucleotide.A nucleotide polymer makes up the DNA molecule.Watson and Crick presented a model for the DNA’s double-helix structure.In the 1950s, while working together at Cambridge, England, Watson and Crick were able to piece together the jigsaw of the DNA molecule using Franklin’s discoveries.In 1953, Rosalind Franklin, a researcher at Wilkins Lab in the US, used X-ray crystallography to explore the structure of DNA.The patterns revealed important details about the structure of any molecule of interest.One could see the patterns produced by the X-rays when they were shot through the crystal of a material. X-ray crystallography was used for analysing molecular structure.

Linus Pauling, in 1925, utilised X-ray crystallography to determine the secondary structure of proteins.James Watson and Francis Crick realised that these pairing principles indicated that either strand held all the information needed to build a new copy of the complete molecule and that the aperiodic sequence of bases might offer a “genetic code”. The bases are divided into four categories (A, C, G, and T), with A & T and C & G always matching. On the surface, it has two backbones (with alternating glycosyl and phosphate groups) that are linked together on the inside by hydrogen bonds between pairs of nitrogenous bases. DNA is a helical, double-stranded molecule with two strands.

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