The Watson's Crick double helix model of DNA is: (A) Right handed anti parallel, (B) Left handed anti parallel, (C) Right handed parallel, (D) Left handed parallel
Answer is A. Ans. (a) Right handed anti parallelRef: Harper's Biochemistry, 30th edn. pg. 360-361* Helical structure assumed by two strands of deoxyribonucleic acid, held together throughout their length by hydrogen bonds between bases on opposite strands, referred to as Watson-Crick base pairing. The structure is right handed anti-parallel structure.