background biochemistry biology biotechnology chemistry chromosome clone cloning deoxyribonucleic dna double education gene genetics helix illustration lab life medical medicine microscopic molecular molecule organic pharmacy research ribonucleic science scientific spiral stem strand symbol technologies technology test therapy acid adenine cell cytosine evolution guanine health human pharmaceutical thymine white 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