How did they discover DNA?

Answer 1

DNA is a volatile molecule, and without active biological repair, will decay rapidly. The samples of DNA that scientists have been able to extract from mummies and frozen Neolithic Germans are due to the atypical preservative condition of those corpses. In general, a body which has been dead and buried has no salvageable DNA (at least not enough to use to identify that person conclusively) after a few decades or centuries.

Answer 2

Miescher was the first to isolate DNA in 1869, but its actual structure was found in 1952 by Watson and Crick. They later went on to building a model based on Mieschers and other scientists discoveries.

Answer 3

NA was largely ignored for decades after a German chemist, Friedrich Miescher, first isolated the white, slightly acidic substance from the nucleus of cells in 1869. No one knew what DNA's function was-in fact, some doubted that it had a function at all-so they pretty much left the stuff aloneVery few people thought that DNA could be the hereditary material. Early studies of DNA suggested, erroneously, that the molecule was made up of the same sequence of four bases repeated over and over-ACGTACGTACGT… for example. No one could imagine how such a monotonously simple molecule could contain the information necessary to build a living organism.

But during the 1930s and 1940s, new experiments began to suggest that DNA might, in fact, be important. It turned out that different strains of bacteria can exchange DNA and that when they do certain traits, such as the ability to cause disease in humans, can be passed from one strain of bacteria to another. Scientists also learned that when a virus infects a cell it injects its DNA into the cell, which then produces many copies of the virus, suggesting that DNA contains instructions for building viruses. And they found that different species of organisms have different proportions of bases in their DNA-one species might have DNA that is 30 percent A, 20 percent C, 20 percent G, and 30 percent T, while another might have 20 percent A, 30 percent C, 30 percent G, and 20 percent T. People began to think that genetic information might be written in the differences between the DNA bases of different species.

Answer 4

DNA was first isolated by Friedrich Miescher who, in 1869, discovered a microscopic substance in the pus of discarded surgical bandages. He called it nuclein, as it was inside the nucleus of cells.

The structure was determined using a method called x-ray crystallography. This uses the scattering pattern of x-rays by a crystal of the material as shown photographically. Rosalind Elsie Franklin did this work in 1952 for James Dewey Watson and Francis Harry Compton Crick, who are usually credited with this discovery in 1953.

Answer 5

i don't know how but i know it was discovered by maurice wilkins, francis crick, and James Watson.

rosalind Franklin also contributed to the discovery of DNA

Answer 6

From my understanding microbiologist exploring Yellowstone geysers for new life forms that live in the geothermal waters.

Answer 7

In 1665 the first biological cells were documented by Robert Hooke. He looked at thin slices of cork under a microscope.

Answer 8

malik duncan told him