Identify the structure in the picture labeled as D in the picture above. (Level 1)

which picture. ??? no pic no help sorry

the animal that would be cutest if scaled down to the size of a cat? elephant

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides