acid
adenine
bases
biochemistry
bonds
cell
chain
characteristics
chemical
chromosome
cytosine
deoxyribonucleic acid
different
dna
double
element
eukaryote
genes
genetic
genetics
guanine
helical
helix
hereditary
human
illustration
information
medical
nucleic
nucleotides
nucleus
organism
pairs
polynucleotide
protein
reproduction
sequence
strands
synthesis
three
thymine
transfer
transmission
twist
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