DNA- The ins and outs! Watson and Crick's Paper Watson and Crick published a paper that described the complementary structure of DNA. This paper rocked the science world and illuminated the structure of DNA! Check out their Paper below! Watson and Crick published a paper that described the complementary structure of DNA. Watson and Crick's Paper The Complementary Structure of DNA-The paper The Complementary Structure of DNA-The paper [ DNA Replication-Explanation and Video DNA Replication-Explanation and Video Chapter 16 Outline Below is an outline of Chapter 16. Chapter 16 Outline Below is an outline of Chapter 16. Chapter 16 Outline The Cell Craft Challenge Install and Play CellCraft until you complete the 5th level. Download Cell Craft from here As you play the game, keep track of your success by filling out the cell craft worksheet (attached below). Install and Play CellCraft until you complete the 5th level. Worksheets
Google I need a step by step description of DNA replication 1) The enzyme DNA Helicase "unzips" the DNA double helix, breaking the hydrogen bonds that hold the nitrogen bases together. 2) Enzymes are added to the two separated strand portions so that the strands don't twist around and come back together. The two areas on either end of the DNA where the double helix separates are called replication forks. 3) DNA Polymerase glides along the exposed strands, adding complementary nucleotides to the existing ones. 4) When DNA Polymerase is done, two identical strands of DNA have been formed- each containing one old strand and one new strand. Side note: In DNA replication, mutations can sometimes occur when the wrong nucleotide is added.
Friends Have More DNA in Common Than Strangers People may unsuspectingly choose friends who have some DNA sequences in common with them, a new analysis finds. Researchers compared gene variations between nearly 2,000 people who were not biologically related, and found that friends had more gene variations in common than strangers. The study lends a possible scientific backing for the well-worn clichés, "We're just like family," or "Friends are the family you choose," the researchers said. NEWS: How The Sun Changes Your DNA "Humans are unique in that we create long-term connections with people of our species," said Nicholas Christakis, a social scientist at Yale University involved in the study. The researchers did the study because they wanted "to provide a deep evolutionary account of the origins and significance of friendship," Christakis said. The most common gene shared by friends was the "olfactory" gene, which is involved in a person's sense of smell. VIDEO: 98 Percent Of Your DNA Is Junk VIDEO: Imaginary Friends Make You Awesome
3D Animation Library Animations can be viewed within your web browser or downloaded for play from your computer. In some genes the protein-coding sections of the DNA ("exons") are interrupted by non-coding regions ("introns"). RNA splicing removes the introns from pre mRNA to produce the final set of instructions for the protein. Transcript: As DNA is transcribed into RNA it needs to be edited to remove non-coding regions, or introns, shown in green. This editing process is called splicing, which involves removing the introns, leaving only the yellow, protein-coding regions, called exons. RNA splicing begins with assembly of helper proteins at the intron/exon borders. This process is repeated for every intron in the RNA.
Starch and Cellulose Starch and cellulose are two very similar polymers. In fact, they are both made from the same monomer, glucose, and have the same glucose-based repeat units. There is only one difference. In starch, all the glucose repeat units are oriented in the same direction. But in cellulose, each succesive glucose unit is rotated 180 degrees around the axis of the polymer backbone chain, relative to the last repeat unit. When bigshot scientists are talking bigshot scientist talk they say that the glucose units in starch are connected by alpha linkages, and that the glucose units in cellulose are connected by beta linkages. Does this make any difference? Cellulose is a lot stronger than starch.
Genetic pedigrees In these diagrams, people are represented by symbols, usually circles for female and squares for male, and the bottom line represents the children of the couple above. For simplicity, 4 offspring are shown in these examples. However, in practice the number, proportion and order of birth are likely to vary. Obviously, the same technique of family trees can be used to show the results of animal breeding. It is customary to use dark symbols to indicate someone affected with a genetic condition, and unfilled symbols for those who are unaffected. Dominant allele, e.g. Genetic explanation Since the condition is shown in some of the first generation offspring but not in some others, this is not a simple cross between 2 different homozygotes. Note also that in this case the appearance of the condition is independent of the sex of the individual. Genetic diagram Recessive allele, e.g Cystic fibrosis Genetic diagrams For the first section (parents giving rise to the first generation): Example 1 Example 2
DNA from the Beginning - An animated primer of 75 experiments that made modern genetics. DNA from the Beginning is organized around key concepts. The science behind each concept is explained by: animation, image gallery, video interviews, problem, biographies, and links. DNAftb blog: It's the season of hibernation, something I've always wished I could do. Oh, to wrap up in a ball, sleep away the winter, and wake to a beautiful spring day – like Bambi! Feature: We have relaunched the Weed to Wonder site as a flexible "e-book" that can be viewed as a website, an app, or a printable PDF. Mailing List Gene News - ‘Alien’ DNA makes proteins in living cells for the first time Find the DNALC on: Language options:
Hemoglobin: Oxygen Binding The functional unit of Hemoglobin is a tetramer. Each monomer contains a heme group that has the capacity to bind a molecule of oxygen. Thus functional hemoglobin can bind four molecules of oxygen. NOVA | Cracking the Code of Life Cracking the Code of Life PBS Airdate: April 17, 2001 ROBERT KRULWICH: When I look at this—and these are the three billion chemical letters, instructions for a human being—my eyes glaze over. But when scientist Eric Lander looks at this he sees stories. ERIC LANDER (Whitehead Institute/MIT): The genome is a storybook that's been edited for a couple billion years. ROBERT KRULWICH: This is the story of one of the greatest scientific adventures ever, and at the heart of it is a small, very powerful molecule, DNA. For the past ten years, scientists all over the world have been painstakingly trying to read the tiny instructions buried inside our DNA. J. FRANCIS COLLINS (National Human Genome Research Institute): This is the ultimate imaginable thing that one could do scientifically...is to go and look at our own instruction book and then try to figure out what it's telling us. ROBERT KRULWICH: And what it's telling us is so surprising and so strange and so unexpected. I'm Robert Krulwich. DR.