Reference: dickerson, et al, 1982 science, v216, p 475-483 (also good: meth enz v211, 67-111) be sure to see the interactive tutorial on dna structure links to other tutorials can be found at my nucleic acids tutorial page a, b and z forms, depending upon salt and water concentrations and. The discovery of the structure of dna by james watson and francis crick in 1953 is one of the most famous scientific discoveries of all time is this page helpful. The structure of dna (the double helix) dna is made up of six smaller molecules -- a five carbon sugar called deoxyribose, a phosphate molecule and four different nitrogenous bases (adenine, thymine, cytosine and guanine. Deoxyribonucleic acid (dna) fact sheet but nearly a century passed from that discovery until researchers unraveled the structure of the dna molecule and realized. Dna structure questions for students dna structure: teachers: see the lesson plan you are not expected to know all the answers.
The structure of dna double helix and how it was discovered chargaff, watson and crick, and wilkins and franklin. Dna structure: a-, b- and z-dna helix families david w ussery,danish technical university, lyngby, denmark there are three major families of dna helices: a-dna, b-dna and z-dna. The structure of dna in this animation adapted from garland science publishing, a detailed look at dna reveals the structural features that. Nucleic acids have a primary, secondary, and tertiary structure analogous to the classification of protein structure the sequence of bases in the nucleic acid. Dna must also be capable of copying the information it contains the two-stranded structure of dna gives it both of these properties.
Structure of dna dna has a double helix shape, which is like a ladder twisted into a spiraleach step of the ladder is a pair of nucleotides nucleotides a nucleotide is a molecule made up of. Start studying dna structure learn vocabulary, terms, and more with flashcards, games, and other study tools.
Deoxyribonucleotide structure a the concept dna is a string of deoxyribonucleotides these consist of three different components these are the dexoyribose sugar, a phosphate group, and. Dna structuredna structure introductory article article contents richard p bowater, university of east anglia, norwich. The dna molecule that watson and crick described was in the b form it is now known that dna can exist in several other forms the primary difference between the forms is the direction that the helix spirals a, b, c = right-handed helix z = left-handed helix (found in vitro under high salt) b is.
Modeling dna structure in this lesson, students explore the structure of the dna molecule and begin to understand how chromosomes, genes, and the base pairs. How can the answer be improved. Title: dna structure author: cheryl massengale last modified by: cmassengale created date: 10/24/2000 2:26:58 pm document presentation format: on-screen show (4:3.
A secondary school revision resource for ocr gateway additional gcse science about molecule of life, mitochondria and ribosomes, dna and making proteins.
Dna replication is the biological process of producing one identical replica of dna from one original dna molecule take this quiz and learn more about it. Dna structure 1 nucleotides deoxyribonucleic acid, or dna, like proteins, is a linear macromolecule found in all living cells in contrast to proteins, however, it is build up of only 4 different types of building blocks, called nucleotides. An exploration of the structure of deoxyribonucleic acid, or dna if you want to learn more, join our free mitx 700x introduction to biology course (https:. Start studying dna structure, dna structure learn vocabulary, terms, and more with flashcards, games, and other study tools. 7 dna: structure and replication working with the figures 1 in table 7-1, why are there no entries for the first four tissue sources for the last three entries, what is the most likely explanation for the slight differences in.