Watson and crick model of dna: James Watson and Francis Crick proposed that

James Watson and Francis Crick proposed that DNA must be formed like a double helix in 1953. This is called the Watson - Crick Structure of DNA . Watson and Crick used many aluminium templates like this one, which is the single base Adenine (A), to build a physical model of DNA in 1953. When Watson and Crick produced their double helix model of DNA , it was known that most of the specialized features of the many different life forms on Earth are made possible by proteins. Structurally, proteins are long chains of amino acid subunits. In some way, the genetic molecule, DNA , had to contain instructions for how to make the thousands of ... The Watson and Crick model of DNA , also known as the double helix model , is a scientific breakthrough that revolutionized our understanding of genetics. In 1953, James Watson and Francis Crick proposed that DNA has a double helix structure made up of two complementary strands, each consisting of a sugar-phosphate backbone and nitrogenous bases. DNA is the hereditary material as it contains the genetic information. It is the most important constituent of a chromosome. The most widely accepted model of DNA is the double helical structure of James Watson and Francis Crick .