Wonder of DNA 4/10/14 @ 8:00 pm EST Design(er) Conference Site: http://goo.gl/JA3Rw6 Presented by Dr. Georgia Purdom, the first female PhD scientist engaged in full-time research and speaking o... By: Answers in Genesis … Continue reading →

Highlights: George Ude, DNA Barcoding Projects at Bowie State and Godfrey Okoye Universities These clips are highlights taken from some iPlant session presentations at the International Plant and Animal Genome Meeting XXIII (January 2014,San Diego). ... By: iPlant Collaborative … Continue reading →

Highlights: Eugenia Naro-Maciel, CUNY SI -- DNA Barcoding Freshwater Communities at Former Landfill These clips are highlights taken from some iPlant session presentations at the International Plant and Animal Genome Meeting XXIII (January 2014,San Diego). ... By: iPlant Collaborative … Continue reading →

S k y p i feat Dodo - Postav sa zo dna (Official Video ryvok.... ) By: Skypi ft oo … Continue reading →

Deoxyribonucleic acid (DNA) is a molecule that encodes the genetic instructions used in the development and functioning of all known living organisms and many viruses. DNA is a nucleic acid; alongside proteins and carbohydrates, nucleic acids compose the three major macromolecules essential for all known forms of life. Most DNA molecules consist of two biopolymer strands coiled around each other to form a double helix. The two DNA strands are known as polynucleotides since they are composed of simpler units called nucleotides. Each nucleotide is composed of a nitrogen-containing nucleobaseeither guanine (G), adenine (A), thymine (T), or cytosine (C)as well as a monosaccharide sugar called deoxyribose and a phosphate group. The nucleotides are joined to one another in a chain by covalent bonds between the sugar of one nucleotide and the phosphate of the next, resulting in an alternating sugar-phosphate backbone. According to base pairing rules (A with T and C with G), hydrogen bonds bind the nitrogenous bases of the two separate polynucleotide strands to make double-stranded DNA. DNA is well-suited for biological information storage. The DNA backbone is resistant to cleavage, and both strands of the double-stranded structure store the same biological information. Biological information is replicated as … Continue reading →

DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a persons body has the same DNA. Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA). The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same in all people. The order, or sequence, of these bases determines the information available for building and maintaining an organism, similar to the way in which letters of the alphabet appear in a certain order to form words and sentences. DNA bases pair up with each other, A with T and C with G, to form units called base pairs. Each base is also attached to a sugar molecule and a phosphate molecule. Together, a base, sugar, and phosphate are called a nucleotide. Nucleotides are arranged in two long strands that form a spiral called a … Continue reading →

Deoxyribonucleic Acid (DNA) What is DNA? We all know that elephants only give birth to little elephants, giraffes to giraffes, dogs to dogs and so on for every type of living creature. But why is this so? The answer lies in a molecule called deoxyribonucleic acid (DNA), which contains the biological instructions that make each species unique. DNA, along with the instructions it contains, is passed from adult organisms to their offspring during reproduction. Top of page DNA is found inside a special area of the cell called the nucleus. Because the cell is very small, and because organisms have many DNA molecules per cell, each DNA molecule must be tightly packaged. This packaged form of the DNA is called a chromosome. During DNA replication, DNA unwinds so it can be copied. At other times in the cell cycle, DNA also unwinds so that its instructions can be used to make proteins and for other biological processes. But during cell division, DNA is in its compact chromosome form to enable transfer to new cells. Researchers refer to DNA found in the cell's nucleus as nuclear DNA. An organism's complete set of nuclear DNA is called its genome. Besides the DNA … Continue reading →

DNA, short for deoxyribonucleic acid, is the molecule that contains the genetic code of organisms. This includes animals, plants, protists, archaea and bacteria. DNA is in each cell in the organism and tells cells what proteins to make. Mostly, these proteins are enzymes. DNA is inherited by children from their parents. This is why children share traits with their parents, such as skin, hair and eye color. The DNA in a person is a combination of the DNA from each of their parents. Part of an organism's DNA is "non-coding DNA" sequences. They do not code for protein sequences. Some noncoding DNA is transcribed into non-coding RNA molecules, such as transfer RNA, ribosomal RNA, and regulatory RNAs). Other sequences are not transcribed at all, or give rise to RNA of unknown function. The amount of non-coding DNA varies greatly among species. For example, over 98% of the human genome is non-coding DNA,[1] while only about 2% of a typical bacterial genome is non-coding DNA. Viruses use either DNA or RNA to infect organisms.[2] The genome replication of most DNA viruses takes place in the cell's nucleus, whereas RNA viruses usually replicate in the cytoplasm. DNA has a double helix shape, … Continue reading →

DNA robots crawl across a surface made of DNA. DNA-based nanotechnology has been around for more than 30 years, but it really took off in 2006, when DNA origami was featured on the cover of Nature. This form of origami, the folding of DNA into 2D and 3D shapes,was more of an art form back then, but scientists are now using the approach to construct nanoscale robots. The basic principle of DNA origami is that a long, single-stranded DNA molecule will fold into a predefined shape through the base-pairing of short segments called staples. All thats required is to ensure that each staple can find a complementary match to base-pair with at the right location elsewhere in the molecule. This approach can be used to create both 2D and 3D structures. The idea behind the new work is that a DNA origami robot can be programmed to have a specific function based on a key, which can be a protein, a drug, or even another robot. Once the right key and the right robot find each other, the key drives a conformational (structural) change in the robot. The new shape causes the robot to perform a programmed function, such as … Continue reading →

FACE OF THE FUTURE: Dr Dennis McNevin is part of a team developing DNA tests that can draw exact pictures of suspects. Photo: Jeffrey Chan Australian police and researchers are developing a ground-breaking test that will help them identify suspects based on the DNA evidence they leave behind. It is set to change the way police use DNA evidence. Officers may soon be able to use a single strand of hair from a crime scene to pinpoint whether a suspect has a cleft chin, how many moles they have and whether or not they are bald. The University of Canberra's Dennis McNevin is working on the four-year project set to finish at the end of next year and called ''From Genotype to Phenotype: Molecular Photofitting'', with Victoria Police, the Australian Federal Police and the Queensland Institute of Medical Research. He said Australian police now used DNA evidence to link an existing suspect to a crime scene, but eventually research might lead to their using DNA to create photofit images of potential suspects. Victoria Police forensic officer Runa Daniel, who is working on the project with her colleague Roland van Oorschot, said the research could be used in the absence of … Continue reading →