Watson And Crick: Structure Of The Dna Molecule. Dna Was

Understanding DNA can take a lot of studying and confusion to even get the general idea of the concept. The structure of DNA is very complicated and complex to understand, but researchers James Watson, Francis Crick, Maurice Wilkins, and Rosalind Franklin all developed the idea of the DNA structure in 1953. Deoxyribonucleic Acid is found in the nucleus of the cell. It is a double stranded molecule that contains the genetic code and is the main component of chromosomes. DNA is the blueprint of organisms. Nucleotides are the basic unit of DNA and they are made up of sugar, phosphate, and one of the four basis including adenine,

This paper explores the history and some interesting facts about DNA. The last couple centuries have seen an exponential growth in our knowledge of DNA. The history of the DNA can be traced back to multiple devoted scientist. This article attempts to summarize, and review the basic history of DNA while providing some fascinating information about it.

In the early 1950s, the race to find the structure of DNA was in full swing. The search was being conducted at three different colleges. At the California Institute of Technology, Linus Pauling,

Over the course of the modern age, the human body was still a mystery waiting to be solved. The body contains secrets one can only hope to discover. Over the twentieth century, scientists tried to understand one of the most complex concepts in the biological field. DNA (Deoxyribonucleic acid) was at the forefront of research. Several theories claimed to have solved the structural concept of DNA. However, it was not until Francis Crick and James D. Watson discovered the true structure, the double helix. However, many potential models of DNA had passed through the biology field until eventual lose of credibility. The past models would contain a fixed detail that would make the entire concept invalid. In James D. Watson book, The Double Helix, he illustrates his path amid incorrect theories until he reaches the model that is taught around the world today.

When Pauling and Cory attempted to come up with the structure of DNA, they thought that the DNA helix was a triple helix. This was because they misinterpreted DNA A structure and concluded that the phosphate and sugars were on the inside and the nucleotide bases were on the outside. Watson and Crick said this was not possible because phosphates can’t fit together inside the helix without breaking their molecular bonds. The studies Watson and Crick made were based off of DNA B molecule from the X-ray of DNA B taken by Rosalind Franklin that had low concentration, rather than A DNA which was high in salt concentration that gave Pauling an improper representation of the DNA helix. Pauling and Cory stated that the helix was made of three helices, Watson and Crick disapproved of this concept because phosphate backbones are negatively charged, it was impossible to put three negatively charged strands with each

In Time Magazine an article states On February 28 1953, James Watson and Francis Crick broke the DNA code and discovered that the DNA strand is double helix and forms like a ladder. They found that cytosine and guanine were paired together and that adenine and thymine were paired. They discovered the building block of life (Wright, 1999). DNA is found in all living organisms.

Scientist in early 1950s James Watson a biologist from Indiana University and Francis Crick a physicist were working at lab to discover the structure of DNA. The primary technique for structural analysis of biological molecules is X-rays. The wave length of X-ray is about the same as the space between the atoms in crystal matters. We learn and know that genetic information was carried on chromosomes made up of DNA and protein. Maurice decided and taken the first x-ray picture of DNA that lead him to suggest the DNA structure might be a helix. Watson was able to rely on Wilkins' research. If he had not, he may have not been the one to discover the structure of DNA. The biggest thing I learned from my research is that scientists can’t make discoveries

Ok let's break DNA down first. DNA stands for Deoxyribonucleic acid. Deoxyribose is referred to the absence of an O in the Carbon 2 of the ribose pentose. DNA is made up of six smaller molecules a five-carbon sugar called deoxyribose, a phosphate molecule and four different nitrogenous bases adenine, thymine, cytosine and guanine. The basic building block of DNA is called a NUCLEOTIDE. A nucleotide is made up of one sugar molecule, one phosphate molecule and one of the four bases. In other words, the sugar that makes DNA is ribose a pentose sugar in the case of this molecule DNA its lacking an Oxygen in its carbon 2. Nucleic is referred to its position, our DNA most anyways is located on the nucleus of our cells, the presence of this nucleus is what differs us from Prokaryotes us being Eukaryotes.

Watson and Crick discovered that cell’s nucleuses contained a molecule that was called deoxyribonucleic acid, or DNA. The clues from the diary are: “Even us lab boys knew that there had been gossip going around the labs that Crick and Watson had been trying to solve the structure of this new-fangled molecule called DNA – deoxyribonucleic acid – but discovering the secret of life itself?”

Although DNA was initially observed by Frederich Miescher, a German biochemist near the end of the nineteenth century, the key to the structure of DNA was not discovered until almost a hundred years later. It was at that time that science realized the importance of DNA to the study of biology.

The quest for deoxyribonucleic acid was a search that had drawn out for quite a long time. The fame for the discovery of the structure of the double helix belonged to Watson and Crick, for they had debunked the mystery in 1953. Their finding denoted a milestone in the history of science. It also set the path for future biology studies. This study like all others, began with a solitary idea, a single experiment, which sparked future generations to follow the same path. This follows the fact that the scientific method is not linear, it is circular. Utilizing this, the two researchers, Watson and Crick, began with a purpose, collected background research on the topic, and created a hypothesis which led them to results that may or may not have

the world of science was racing to solve. Franklin was able to deduce from x-rays that DNA was the shape of a

Deoxyribonucleic (DNA) is the molecule that hold the genetic information of living things. In our body every cell contains about 2 meters of DNA. DNA is copied every time a cell divides. Deoxyribonucleic (DNA) is made up of two polynucleotide strands. Polynucleotide strands twist around each other, forming a shape that looks like a ladder called a double helix. The two polynucleotide strands run antiaparallel to each other with nitrogenous bases this means that the stands run in opposite directions, parallel to one another. The DNA molecule consists of two backbones chains of sugars and phosphate groups. The organic bases held together by hydrogen bonds. Although bases bonded together are termed paired

Crick and Watson used X-ray diffraction data, which Rosalind Franklin developed which was then used to develop the ‘double

Rosalind Franklin’s work on DNA was crucial in discovering the composition of the human body as a whole. Her x-ray photo revealed a double helix structure and she also discovered the A and B form of DNA. She worked through the adversity of being a female in a predominately male dominated realm and made remarkable findings that were eventually stolen. She adapted to a new lab with antiquated technology. Before this discovery, the structure of DNA was thought to be simple. Scientist, Watson and Crick, started with the wrong structure of DNA from a misinterpretation of notes from one of Franklin’s presentations. Unlike Watson and Crick, Rosalind Franklin could explain DNA and how it worked.