DNA: Multiple Choice Vocabulary Test

The (0) A that genetic information in animals and plants is carried by something (1)_______ DNA is now regarded as (2)_______ knowledge. Before the 1950s, however, (3)_______ was known about DNA or how it worked. One of the (4)_______ moments in science occurred in 1953, when Francis Crick and James Watson at Cambridge University discovered the structure of DNA. They said that DNA was (5)_______ to two spiral staircases going up and down at the same time. Scientists all over the world (6)_______ this "double helix' model immediately. The discovery was, of course, the result of years of hard work, and Crick and Watson were not the only scientists who had been (7)_______ out research in an attempt to find out what DNA (8)_______ like. Maurice Wilkins and Rosalind Franklin at King's College, London, had also been (9)_______ on the problem. They used x-ray analysis of DNA, (10)_______ Crick and Watson preferred to build models. One day, without (11)_______ a word to her, Wilkins showed Franklin's results to Watson, and it was those results which helped him to discover the real structure of DNA. In 1962, Watson, Crick and Wilkins were (12)_______ the Nobel Prize for their work. Rosalind Franklin, who had died four years earlier, was not even mentioned at the ceremony.