DNA molecule looks like a twisted ladder
Answers
Answer:
They showed that alternating deoxyribose and phosphate molecules form the twisted uprights of the DNA ladder. The rungs of the ladder are formed by complementary pairs of nitrogen bases — A always paired with T and G always paired with C.
Explanation:
earlier work and shown that DNA is composed of building blocks. called nucleotides consisting of a deoxyribose sugar, phosphate group ,and 1 of 4 nitrogen bases adenine(A),thymine(T),guanine (G),and cytosine (C).phosphates and Sugars of adjacent nucleotides are linked to form a long polymer other key experiments show that the ratio of AtoT and g to c are constant in all living X Ray crystallography provided the final clue that the DNA molecule is a double helix,shaped like a twisted ladder.