acid adenine biochemistry biology biotechnology cell chemistry chromosome clone cloning cytosine deoxyribonucleic dna double education evolution gene genetics guanine health helix human illustration lab life medical medicine microscopic molecular molecule organic pharmaceutical pharmacy research ribonucleic science scientific spiral stem strand symbol technologies technology test therapy thymine white background blue dark concept angled angles Australia climb climbing constructed construction curve curved curves danger dangerous deoxyribonucleic-acid DNA-double-helix-molecule DNA-Tower double-helix handrails height helices helixes high Kings-Park lookout lookout-tower park Perth platform public- park skywards spiral-staircases spiraling spiralling staircases steel strength strong structure top tower towering turning view viewing-decks Western-Australia