Ace the UK Citizenship Test 2026 – Unlock Your British Adventure!

The answer is Francis Crick, who, along with James Watson, is famously known for co-discovering the double helix structure of DNA in 1953. This pivotal discovery fundamentally changed our understanding of genetics and molecular biology. Crick and Watson's collaboration led to the formulation of the DNA model, which demonstrated how genetic information is stored and replicated within living organisms.

Their work was significantly influenced by the earlier X-ray diffraction images produced by Rosalind Franklin, which provided critical insights into the helical structure of DNA. While Franklin's contributions were essential to the overall discovery, it was Crick and Watson who are specifically credited with the elucidation of DNA's structure.

The choice of Gregg Simpson does not align with this historical achievement, as he is not recognized for any contributions to the discovery of DNA's structure.