Learning Goal: I’m working on a biology writing question and need the explanation and answer to help me learn.
Explain the structure of a DNA molecule
answer. The DNA molecule is a double-stranded helix made up of nucleotides. Each nucleotide contains a sugar, a phosphate group, and a nitrogenous base (adenine, thymine, guanine, or cytosine). The two strands are held together by hydrogen bonds between complementary nitrogenous bases.