Question

Double helix DNA structure was proposed by

• A. Beadle and Tatum
• B. Hooke and Huxley
• C. Schleiden and Schwann
• D. Watson and Crick

Answer 1

The correct option is D Watson and Crick

Part 1: Beadle and Tatum
Beadle and Tatum gave the one gene-one enzyme hypothesis which states that the formation of an enzyme in our body is governed by a specific gene.

Part 2: Schleiden and Schwann
Schleiden and Schwann gave the cell theory stating that all living organisms are made up of cells and cells are the structural and functional unit of life.

Part 3: Watson and Crick
Watson and Crick proposed the double helix model of the structure of DNA based on Chargaff’s rule of base pairing and X- ray crystallography by Maurice Wilkins and Rosalind Franklin, on DNA’s physical structure.

Final answer
(c) Watson and Crick