What did Watson and Crick's model of DNA show?

A. two nucleotide strands wound in a double helix

B. sugars and phosphates on the inside

C. nitrogenous bases on the outside

D. a single nucleotide strand twisted in a spiral

Answer

The option A is correct, becuse their model shiw tha DNA is composed of two double strand of nucleotide which are twisted around each other and run in antiparallel direction. the phisphate group and pentose sugar are present on outside, while nitrogenous base is present on inside.