Three Experiments Regarding DNA Essay

515 Words 3 Pages
Experiment #1
James Watson, Maurice Wilkins, and Francis Crick joined together for the finding of the structure of DNA, or deoxyribonucleic acid. Wilkins and Rosalind Franklin used X-ray diffraction to study DNA through its images, and it was on April 1953 that they finally published the discovery of the structure of DNA; they discovered how the hereditary information is coded on the DNA as well as its replication. Watson found out from Franklin’s lectures that DNA existed in two forms of ways, which depended on the humidity of the air. As Franklin studied the x-rays diffractions, she found that the higher humidity form of DNA had characteristics of a helix. Watson and Crick proposed that it was made of two chains of nucleotides, both
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Afterwards, he heated the deadly bacteria and once again injected it in the mice, which resulted in no death. Griffith also injected a live non-deadly strain of bacteria and the mice did not die. However, once Griffith injected both live non-deadly bacteria and heat-killed bacteria in the mice, some of the mice had died. In dead mice, he had found live deadly bacteria in their blood, which led to his hypothesis that the DNA in the heat-killed deadly bacteria had survived through the heating and was in the genetic material of the non-deadly bacteria, which was the cause of the mice’s death.
Avery, MacLeod, and McCarty concluded that DNA caused the transformation. They separated and tested the DNA, RNA, lipids, proteins, and carbohydrates from the deadly bacteria for transformation. They added each to live non-deadly bacteria to try to identify the mice’s death. As they reached their conclusion, only DNA did the transformation of the non-deadly bacteria; and they also concluded that DNA itself determines the polysaccharide and produces deadly when added to live non-deadly bacteria.
Experiment #3
Alfred Hershey and Martha Chase concluded that DNA is the genetic material of the bacteriophage, and as they experimented they questioned if either the DNA or protein was the cause of for the bacteriophage to control the activity of the bacteria as to resulting in new

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