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Funded by the Howard Hughes Medical Institute (HHMI), myDNAi was designed to help educators make the most of the content on the companion site, DNA Interactive. Released in November 2003, myDNAi is a package of classroom resources and tools that allow teachers to create their own materials. Working closely with expert Teacher Fellows, we developed […]
This chapter will explore the structure of nucleic acids and proteins.DNA StructureDNA is composed of several different subunits. The backbone of the molecule is made of a sugar called deoxyribose. The deoxyribose is held together by phosphate groups. Deoxyribose also forms bonds with the four bases, adenine (A), cytosine ( C), thymine (T) and guanine […]
DNA REPLICATION
Replication is the process where DNA makes a copy of itself. Why does DNA need to copy? Simple: Cells divide for an organism to grow or reproduce, every new cell needs a copy of the DNA or instructions to know how to be a cell. DNA replicates right before a cell divides.
DNA replication is […]
Main article: DNA
DNA usually exists in a double-stranded structure, with both strands coiled together to form the characteristic double-helix. Each single strand of DNA is a chain of four types of nucleotide: adenine, cytosine, guanine, and thymine. A nucleotide consists of a phosphate and a deoxyribose sugar — forming the backbone of the DNA double […]
A DNA microarray (also commonly known as gene or genome chip, DNA chip, or gene array) is a collection of microscopic DNA spots, commonly representing single genes, arrayed on a solid surface by covalent attachment to a chemical matrix. DNA arrays are different from other types of microarray only in that they either measure DNA […]
The Secret Life of DNA - DNA Music compositions
[2] Crick’s personal papers at Mandeville Special Collections Library, Geisel Library, University of California, San Diego
DNA Interactive This site from the Dolan DNA Learning Center included dozens of animations as well as interviews with James Watson and others (requires Adobe Flash)
DNA from the Beginning Another DNA Learning […]
Rosalind Franklin
Francis Crick
James Watson
Further information: History of molecular biology
DNA was first isolated by the Swiss physician Friedrich Miescher who, in 1869, discovered a microscopic substance in the pus of discarded surgical bandages. As it resided in the nuclei of cells, he called it “nuclein”. In 1919 this discovery was followed by Phoebus Levene’s identification […]
The DNA structure at left (schematic shown) will self-assemble into the structure visualized by atomic force microscopy at right. DNA nanotechnology is the field which seeks to design nanoscale structures using the molecular recognition properties of DNA molecules. Image from Strong, 2004Â
Further information: DNA nanotechnology
DNA nanotechnology uses the unique molecular recognition properties of DNA and […]
Bioinformatics involves the manipulation, searching, and data mining of DNA sequence data. The development of techniques to store and search DNA sequences have led to widely-applied advances in computer science, especially string searching algorithms, machine learning and database theory. String searching or matching algorithms, which find an occurrence of a sequence of letters inside a […]
Forensic scientists can use DNA in blood, semen, skin, saliva or hair at a crime scene to identify a perpetrator. This process is called genetic fingerprinting, or more accurately, DNA profiling. In DNA profiling, the lengths of variable sections of repetitive DNA, such as short tandem repeats and minisatellites, are compared between people. This method […]
