Question

DNA structure was discovered by Watson and Crick in:

• A. 1953
• B. 1962
• C. 1952
• D. 1951

Hint:

DNA double helix discovery → 1953
Nobel Prize for the discovery → 1962 Do not confuse the discovery year with the Nobel Prize year.

Answer 1

The Correct Option is A

Step 1: Recall the discovery of DNA structure. James Watson and Francis Crick proposed the double helical structure of DNA based on:
X-ray diffraction data (by Rosalind Franklin and Maurice Wilkins),
Chargaff’s rules on base pairing.
Step 2: Identify the year of discovery. Their landmark paper titled \emph{“A Structure for Deoxyribose Nucleic Acid”} was published in the journal \emph{Nature} in the year: \[ 1953 \]
Step 3: Eliminate incorrect options.
1951 — Before sufficient experimental evidence
1952 — X-ray studies ongoing
1962 — Year Watson, Crick, and Wilkins received the Nobel Prize
Hence, the correct answer is \[ \boxed{1953} \]