Answer: James Watson and Francis Crick
Explanation:
The attached image with the question is of DNA. DNA stands for Deoxyribonucleic Acid. DNA is a double-stranded, helical molecule. The double helical model is proposed by James Watson and Francis Crick and awarded Nobel Prize for this discovery. DNA is made of nucleotides. Each nucleotide is made of pentose sugar, phosphate and one of the four nitrogenous base. DNA is the genetic material that contains all the genetic information.
