A double helix, or a twisted-ladder shape, is the standard structure of DNA. It consists of two strands of a sugar-phosphate backbone and the nucleotide base pairs adenine, thymine, guanine and cytosine. Adenine pairs with thymine, and guanine pairs with cytosine by non-covalent hydrogen bonds.
The structure of DNA was discovered by James Watson and Francis Crick. They published their paper "A Structure for Deoxyribose Nucleic Acid" in April of 1953. In 1962, they won the Nobel Prize in Physiology or Medicine for their discovery of the double helix structure of DNA.
DNA, or deoxyribonucleic acid, is used in the human body in order for an organism to reproduce, develop and survive as well as in science for genetic engineering, forensics, bioinformatics, evolutionary history and information storage. A human's DNA code contains about 3 billion bases and 20,000 gen
The majority of DNA is located in the cell nucleus, where it is called nuclear DNA. A small amount is located in the mitochondria, where it is called mitochondrial DNA.
DNA is made of repeating units called nucleotides. The four nucleotides in DNA are adenine, cytosine, guanine and thymine. Adenine binds with thymine, and guanine binds with cytosine.
The phrase that best describes the structure of DNA is "double helix." The DNA molecule resembles a ladder that has been twisted. This double-helical structure was first proposed by researchers James Watson and Francis Crick.
DNA works by storing information that tells the body how to develop, survive and reproduce cells. DNA sequences are made up of four types of nucleotides: adenine, thymine, cytosine and guanine. Information in DNA is stored by the ordering of bonded nucleotides and resides in pieces of DNA called gen
DNA is located mainly in the nucleus, but can also be found in other cell structures called mitochondria. Since the nucleus is so small, the DNA needs to be tightly packaged into bundles known as chromosomes.
Each chromosome in the cell nucleus contains DNA compressed to over 10,000 times shorter than it would be if it were to be stretched out. Despite this compression, each chromosome is capable of rapidly unwinding, taking up new complementary nucleotides and reforming during each cycle of mitosis.
The basic unit of DNA is a nucleotide. Each nucleotide consists of three portions: a phosphate group, a five-carbon sugar and a nitrogenous base. DNA uses four nitrogenous bases: adenine, thymine, guanine and cytosine.