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What is DNA?

- BBC Bitesize What is DNA? What is DNA? DNA stands for deoxyribonucleic acid. It is a chemical made up of two long molecules, arranged in a spiral. We refer to this as the double-helix structure.

How did scientists work out the structure of DNA?

Scientists worked out the structure of DNA in the 1950s. Rosalind Franklin made ‘X-ray diffraction’ images of DNA. James Watson and Francis Crick used information from one of her images to work out a model for the structure of DNA. Work by Maurice Wilkins, a colleague of Franklin, supported their model.

What is DNA1?

1 DNA stands for deoxyribonucleic acid. It is a chemical made up of two long molecules, arranged in a spiral. We refer to this as the double-helix structure. 2 DNA carries genetic information. It has all the instructions that a living organism needs to grow, reproduce and function. 3 Forensic scientists use DNA profiles to help solve crimes.

What is the function of dnadna?

DNA carries genetic information. It has all the instructions that a living organism needs to grow, reproduce and function. Genes are short sections of DNA. Genes carry information for particular characteristics, such as ear shape or eye colour.


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