question_answer 72)

  That background information did Watson and Crick have made available for developing a model of DNA? What was their contribution?

Answer:

                  Watson and Crick had the following informations which helped them to develop a model of DNA. (i) Chargaff's Law suggesting and (ii) Wilkins and Rosalind Franklin's work on DNA crystal's X-ray diffraction studies about DNAs physical structure. Watson and Crick proposed (a) Pattern of complementary bases pair (b) Semi-conservative replication (c) Mutation through tautomerism