Question

The double strand helix structure of DNA was proposed by:

• A. Har Gobind Khorana
• B. Watson and Crick
• C. A. R. Todd
• D. G. W. Kenner

Answer 1

Answer: (B)

Watson and Crick

Watson and Crick discovered the twisted ladder or double strand helix structure of the DNA wherein each strand is accompanied by a backbone made up of alternating groups of sugar and phosphate and to each sugar, one among the four bases, i.e, adenine, thymine, guanine, or cytosine is attached.