Question

DNA molecule looks like a twisted ladder​

Answer 1

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.

Answer 2

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.