Question

why DNA has a twisted shape? ​

Answer 1

Answer:X-ray crystallography provided the final clue that the DNA molecule is a double helix, shaped like a twisted ladder. ... They showed that alternating deoxyribose and phosphate molecules form the twisted uprights of the DNA ladder.

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Answer 2

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The alternating deoxyribose and phosphate that form the backbone twist in response to bonding between two strands. ... 
DNA has two stranded which are held together by hydrogen bonding. These double stranded structure make DNA molecule more stable. Due to double strand nature DNA are attached with HISTONE PROTEIN.



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