Answer:
A DNA molecule is composed of two strands. The structure of DNA is a double-helix polymer, a spiral consisting of two DNA strands twisted around each other Each strand has a backbone made of alternating sugar the four nitrogenous bases in a dna are adenine, cytosine, guanine, and thymine,.Complementary pairs of four nitrogenous bases in DNA adenine and thymine, cytosine and guanine, By a dotted line are specified hydrogen bonds in these pairs, adjacent nucleotides are linked by a phosphodiester bonds
Explanation:
i hope this is right it took me awhile to figure this out
