Question

Who proposed the double helical model of DNA?

• A. Erwin Chargaff
• B. Rosalind Franklin
• C. Watson & Crick
• D. Linus Pauling

Hint:

Think W & C for Watson & Crick — DNA’s double helix pioneers.

Answer 1

The Correct Option is C

The double helical structure of DNA was proposed by James Watson and Francis Crick in 1953.
Their model described DNA as two strands coiled around each other, explaining how genetic information is stored and replicated.
Erwin Chargaff contributed crucial data on base pairing rules but did not propose the model.
Rosalind Franklin provided essential X-ray diffraction images that supported the helical structure but did not publish the double helix model herself.
Linus Pauling worked on protein structures and had proposed an incorrect triple helix DNA model.
Therefore, the double helix model is credited to Watson & Crick.