Question

Watson and Crick were awarded Nobel Prize for their finding of

• A. RNA is single stranded
• B. DNA is double stranded
• C. DNA is genetic material
• D. DNA guides mRNA synthesis

Answer 1

Answer: (B)

DNA is double stranded

Nucleic acids were first discovered by Fredrick Meischer in the nuclei of pus cells. Double helical structure of DNA was proposed by Watson and Crick. DNA and RNA are the chain of polynucleotide which are joined by the phosphodiester bonds. The two nucleotide is linked by the phosphodiester bond. It is formed by the linkage between the 3' carbon atom of one sugar molecule and the 5' carbon atom of another. The two strands are antiparallel as one runs in 5'-3' direction as the 3' end of sugar is attached to the phosphorous and the other strand is complimentary which runs in 3'-5' direction where 5' end of sugar is attached to the phosphorous.

So, the correct answer is option B.