The Structure Of A Double Helix

Chromosome (A75): DNA is wrapped around proteins like thread around a spool and compacted into structures called chromosomes.

Each human being has something called DNA. DNA is described as genetics and an extremely long macromolecule that is the main component of chromosomes and is the material that transfers genetic characteristics in all life forms. DNA constructs of two nucleotide strands coiled around each other in a ladder like arrangement with the sidepieces composed of alternating phosphate and deoxyribose units and the rungs composed of the purine and pyrimidine bases adenine, guanine, cytosine, and thymine. Each chromosome consist of one continuous thread-like molecule of DNA coiled tightly around proteins and contains a portion of the 6,400,000,000 basepairs that make up your DNA.

Structure and function in Biology is a broad concept that can be explored within a diverse range of topics across the subject matter. The following essay will be focussed mainly on the subject of Deoxyribonucleic Acid, or more commonly DNA. DNA is a highly complex, intricate and extraordinary macromolecule found within all living cells. DNA is a "biochemical noun" and can be defined as "...a self-replicating material which is present in nearly all living organisms as the main constituent of chromosomes. It is the carrier of genetic information." [Oxford Dictionary, c2016] DNA is found in the nucleus of eukaryotic cells, enclosed within a double membrane. Eukaryotic cells are multifaceted and require a high level of regulation to ensure smooth functioning. The double membrane of the nucleus allows gene expression, a key function of DNA, to be efficiently regulated.

Deoxyribonucleic acid, or in its’ simple form DNA, contains the code for all characteristics of an organism which is completed by a double helix structure. The structure is made up of a back bone and the four gene groups which include thymine, adenine, cytosine and guanine. The double helix structure contributes to the cell division process

Inside each and every cell in your body is a strange chemical called deoxyribonucleic acid, better known as DNA. DNA is a double-helix structure that is made up of billions of nucleotides. They are adenosine, thymine, cytosine, and guanine, abbreviated A, T, C, and G, respectively. “The information content resides in those chemical bases arranged within the interior, where A always pairs with T, and C always pairs with G” (Collins 6). These base pairs are lined up in a pattern as rungs on the DNA “ladder”. A gene is a section of base pairs in the strand of DNA. The smallest genes span about a few hundred base pairs, and the largest

genetic information. The information is stored as a code made up of four chemical bases:

DNA is a molecule that has a repeating chain of identical five-carbon sugars (polymers) linked together from head to tail. It is composed of four ring shaped organic bases (nucleotides) which are Adenine (A), Guanine (G), Cytosine (C) and Thymine (T). It has a double helix shape and contains the sugar component deoxyribose.

All eukaryotic cells get their genetic information from DNA, which are strands of nucleotides whose order conveys genetic information to the cell. Structurally, DNA looks like a ladder. A DNA strand is made up of a sugar-phosphate backbone (similar to the sides of a ladder, alternating sugar and phosphate) and is connected in the middle with paired purines and pyrimidines (fancy names for four chemicals that make up the steps of the ladder). Scientists refer to the distinctive shape of DNA as "a double helix."

Strands of the DNA are composed of a sugar and phosphate, portions of the nucleotides while the middle parts of the DNA are made up of nitrogenous bases. The hydrogen bonds between phosphates cause the DNA strand to twist. The nitrogenous bases point inward on the ladder and form pairs with bases on the other side, like rungs. The nitrogenous bases on the two strands of DNA pair up, purine with pyrimidine (adenine with thymine and guanine with cytosine) and are held together by hydrogen bonds. DNA has a spiral staircase-like structure. The steps are formed by the nitrogen bases of the nucleotides where adenine pairs with thymine and cytosine with

In “The Double Helix” by J.D. Watson he tells the story as to how he and Francis Crick discovered the structure of DNA. After reading this book I was able to see how the structure of DNA was discovered since I didn't really have a lot of knowledge as to who discovered DNA besides what the biology book briefly talked about. During this time there was not a lot of people interested in DNA but for the people that were it was almost like a race to see who could discovered it first. Through the book one of their most fierce competition would have to be Maurice Wilkins and Rosalind Franklin. Thanks to their research Watson and Crick were able to discover the structure of DNA first.

DNA is a series of sugars linked together in a specific order. This specific order of sugars: adenine, thymine, guanine, and cytosine, with its associated base determines the genetic information that a person will have. Each parent supplies the offspring with complementary strands of DNA passed down in tight structures known as chromosomes. The DNA codes for a specific gene and the nucleotides give the exact order of amino acids/proteins. DNA has the shape of a double helix. This shape is like two spirals wrapped around each other. The shape of DNA is essential to the way in which it functions because

What is DNA? - DNA or deoxyribonucleic acid according to Genetic Home reference is the hereditary in humans and all other organisms. The website said that nearly every cell in a person’s body has the same DNA. They say that most DNA is located in the cell’s nucleus, but smaller amounts of DNA can be found in the mitochondria. They said that DNA bases pair up with each other. “A” or adenine goes with “T” or Thymine and “G” or guanine goes with “C” or cytosine. These pairs are called base pairs. According to genetics home reference an important property of DNA is that it can replicate, or make copies of itself. Your Genome said “DNA is a long molecule that contains our unique genetic code. Like a recipe book it holds instructions for making all the protein in our bodies.” They

DNA or Deoxyribonucleic Acid is very important to cells. DNA is considered the code and each code gives directions to protein molecules. What exactly is DNA though? DNA is a nucleic acid macromolecule with a double helix structure. The parts of DNA are nucleotides, nitrogenous bases, and then the hydrogen bonding. The nucleotides are made of a carbon sugar, a nitrogenous base, and a phosphate group. The nucleotides are held together by covalent bonds made up of sugar. The nucleotides stick sideways on the side of the chain. The nitrogenous bases are bases mainly containing nitrogen and containing adenine, guanine, cytosine, and thymine. Nitrogenous bases are labeled with the letters, A, D, C, and T. These nitrogenous bases stick out sideways of the chain. Once these two parts are created the nitrogenous base ends and the nucleotide ends create a ladder. The hydrogen

All living organisms, from amoebas to humans, have a molecular code called DNA in their cells, which instruct the activities that keep the organism alive. DNA is made up of long, twisted strands of four molecular “letters” (A, T, G, and C), which pair up according to their complementary base pairs, and their order determines how proteins — the vital molecules that perform all the major tasks in our cells — are made. (Refer to Diagram 1 to help sum up the concept.)

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