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For my project I will be researching the DNA. The following is the history, the parts, the function of the parts, and some basic information of the DNA.

Here is the history of the DNA.

Since the mid 1800's scientists have known that the nuclei of cells contain large molecules called nucleic acids.

Gregor Mendel, a monk who performed an experiment in 1857 that led to the study of genetics. It involved growing thousands of pea plants for eight years. He died in 1884, and never got to finish the experiment.

In 1928, Frederick Griffith worked on a project that let us know that DNA is inherited. Griffith's experiment involved two mice and two kinds of pneumonia, one was virulent and one was non-virulent. The mouse that got the virulent pneumonia died and the one that got the non-virulent pneumonia lived.

Oswald Avery continued with Griffith’s experiment 14 years later to see what the inheritance molecule was. He destroyed lipids, ribonucleic acids, carbohydrates, and proteins of the virulent pneumonia. Next, he destroyed the deoxyribonucleic acid. Avery had found DNA.

In the 1940’s Erwin Chargaff noticed a pattern in adenine, guanine, cytosine, and thymine. He took samples of DNA of different cells and found that the amount of adenine and thymine had equal amounts and that guanine and cytosine were also equal. That is how A and T go together, and how G and C go together. This was discovered and became known as Chargaff’s rule.

Rosalind Franklin and Maurice Wilkins decided

to try to make a crystal DNA molecule. If they

could get DNA crystal, then they could make

an x-ray pattern, the results in

understanding how DNA works. The two

scientists were successful and obtained an

x-ray pattern.

James Watson and Francis Crick in 1953 were trying to put together a model of DNA. While they were researching they saw Franklin and Welkin’s picture of the X-ray. They had enough information to make a correct model. They created the current model of DNA.

By 1950, chemists had learned what nucleic acid DNA was made of, but they didn’t understand how the parts of DNA arranged.

That is the history of the DNA.

Here are the parts and the function of the parts of the DNA.

There are three parts to the DNA; a sugar called deoxyribose, phosphates, and a nitrogen base.

The deoxyribose provides the sugars for the DNA.

The phosphate provides the salt for the DNA that keeps it running.

Finally, the nitrogen base provides the DNA with chemicals that is needed to keep it running like it should be.

That is the parts and the function of the parts of the DNA.

Finally, here is some basic information on the DNA.

It stands for deoxyribonucleic acid. The shape of the DNA is spiraled and the structure is very strong. A good example of how it looks is, a ladder twisted. It is the opposite of RNA, and finally, it has four bases which are A, G, C, T. A and T always go together and G and C always go together. A stands for adenine, G stands for guanine, T stands for thymine and C stands for cytosine.

That is some basic information on the DNA.

That was the parts, the function of the parts, the history, and some basic information of the DNA.

I learned a lot about DNA and enjoyed researching it.

It involved growing thousands of pea plants for 8 years.

The History of DNA

By: Seth Barrick

By 1950 chemists had learned what nucleic acid DNA was made of, but they didn’t understand how the parts of DNA arranged.

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