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The double helix model of DNA was propos...

The double helix model of DNA was proposed by

A

1. Har Gobind Khorana

B

2. Watson and Crick

C

3. A.R. Todd

D

4. G.W. kenner

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks who proposed the double helix model of DNA. This is a straightforward factual question. 2. **Identifying Key Figures**: The double helix model is a significant scientific discovery in the field of genetics and molecular biology. The key figures associated with this discovery are Francis Crick and James Watson. 3. **Historical Context**: In 1953, Crick and Watson published their findings regarding the structure of DNA, describing it as a double helix. This model explains how genetic information is stored and replicated in living organisms. 4. **Conclusion**: Based on the historical context and the contributions of these scientists, the answer to the question is that the double helix model of DNA was proposed by Francis Crick and James Watson. 5. **Final Answer**: The correct answer is Francis Crick and James Watson. ---
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