You will hear a scientist talking about an important discovery in molecular biology. For questions 1-9, complete the sentences with a word or short phrase.
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As well as contributing to the discovery of new techniques, the speaker suggests the double helix discovery 1 a new field of science. Watson and Crick were jointly awarded a Nobel Prize open to people with a background in 2 Oswald Avery proved conclusively that hereditary 3 was contained in human DNA. Crick and Watson were adept at using the discoveries of 4 for their own purposes in investigating the composition of DNA. Such was their focus and determination to discover the secrets of genetics that their success was almost a 5 Their 6 put them at an advantage in their quest, though they also relied on their intuition and persistence, and had no shortage of good fortune. Alexander Todd had already found out the roles of certain 7 in the composition of DNA. Chemist Linus Pauling's innovative technique of 8 was employed by Crick and Watson in their research. Jerry Donohue's observation that there was a flaw in conventional theory of chemistry paved the way for Crick and Watson's 9