double helix structure of the dna strand

molecule dna double helix formed two complementary strands nucleotides held together hydrogen bonds g-c a-t base pairs duplication genetic information occurs use one strand template formation dna helix science genome strand virus molecule biotechnology medical protein genetic rna structure biology medicine gene antibody research nucleus molecular health double acid spiral cell technology chemistry biochemistry blood human chromosome scientific evolution graphic model laboratory analysis code life microscopic deoxyribonucleic healthcare innovation microbiology chemical discovery atom particle