base azotée ribose | Chemical structure of nucleotides. (click on image to enlarge)

base azotée ribose | Chemical structure of nucleotides. (click on image to enlarge)

Hermann Emil Fischer	    Chimiste allemand (1852-1919) Prix Nobel de chimie en 1902  Grâce à ses recherches sur la chimie des sucres et des purines, Fischer a joué un rôle prépondérant dans l’évolution de la chimie organique. Dès 1881, il détermine la structure de l’acide urique, de la xanthine, de la caféine et d’autres composés dérivant tous d’une même base azotée : la purine, qu’il réussit à synthétiser en 1898.

Hermann Emil Fischer Chimiste allemand (1852-1919) Prix Nobel de chimie en 1902 Grâce à ses recherches sur la chimie des sucres et des purines, Fischer a joué un rôle prépondérant dans l’évolution de la chimie organique. Dès 1881, il détermine la structure de l’acide urique, de la xanthine, de la caféine et d’autres composés dérivant tous d’une même base azotée : la purine, qu’il réussit à synthétiser en 1898.

A schematic shows 24 nucleotides arranged to form a double-stranded segment of DNA using grey horizontal cylinders as sugar molecules and colored vertical rectangles as nitrogenous bases.

A schematic shows 24 nucleotides arranged to form a double-stranded segment of DNA using grey horizontal cylinders as sugar molecules and colored vertical rectangles as nitrogenous bases.

A diagram shows the three separate components of a nucleotide and how they are combined to form a complete molecule. A nitrogenous base is represented as a purple hexagon. A sugar is represented as a grey pentagon. A phosphate group is represented as a light brown circle. A cut-away from the generic nitrogen base shows the chemical structure of the three types of pyrimidine bases (cytosine, thymine, and uracil) and the two types of purine bases (adenine and guanine).

A diagram shows the three separate components of a nucleotide and how they are combined to form a complete molecule. A nitrogenous base is represented as a purple hexagon. A sugar is represented as a grey pentagon. A phosphate group is represented as a light brown circle. A cut-away from the generic nitrogen base shows the chemical structure of the three types of pyrimidine bases (cytosine, thymine, and uracil) and the two types of purine bases (adenine and guanine).

3 Main differences between DNA & RNA: RNA uses the sugar Ribose while DNA uses Deoxyribose. RNA is single stranded while DNA is double stranded. RNA uses the nitrogenous base Uracil whereas DNA uses the nitrogenous base Thymine.

3 Main differences between DNA & RNA: RNA uses the sugar Ribose while DNA uses Deoxyribose. RNA is single stranded while DNA is double stranded. RNA uses the nitrogenous base Uracil whereas DNA uses the nitrogenous base Thymine.

DNA Nitrogenous Bases, Set of 4 Stone Coasters, adenine, thymine, cytosine, guanine

Deoxyribonucleic acid (DNA) is the hereditary matter in cells that makes up the repository for genes. DNA's structure consists of sugar, phosphate groups,and nitrogenous bases in its nucleotides. These bases are cytosine, thymine, adenine, and guanine. Cytosine and thymine are classified as pyrimidines that have a single ring. Adenine and guanine are classified as purines that have a double rings. Adenine base pairs with thymine (uracil only in RNA), and cytosine base pairs with guanine.

Deoxyribonucleic acid (DNA) is the hereditary matter in cells that makes up the repository for genes. DNA's structure consists of sugar, phosphate groups,and nitrogenous bases in its nucleotides. These bases are cytosine, thymine, adenine, and guanine. Cytosine and thymine are classified as pyrimidines that have a single ring. Adenine and guanine are classified as purines that have a double rings. Adenine base pairs with thymine (uracil only in RNA), and cytosine base pairs with guanine.

Making Sedimentary Rocks w/treasures to excavate: Sand (1-2c) + Gravel (1-2c) + dirt (1-2c) + a mold (Empty 1/2gal milk carton, plastic shoe box, etc), Treasures, Plaster of Paris (~4c). Add water to 1c plaster of paris (pkg directions), stir in sand, gravel, etc.  Pour some into mold/add some treasures; to another 1c plaster add 1/2c used coffee grinds, sand, etc, pour in mold, add more treasures; repeat.  Let dry.  Dig w/old forks/spoons/knives/hammer/etc to reveal treasures

Making Sedimentary Rocks w/treasures to excavate: Sand (1-2c) + Gravel (1-2c) + dirt (1-2c) + a mold (Empty 1/2gal milk carton, plastic shoe box, etc), Treasures, Plaster of Paris (~4c). Add water to 1c plaster of paris (pkg directions), stir in sand, gravel, etc. Pour some into mold/add some treasures; to another 1c plaster add 1/2c used coffee grinds, sand, etc, pour in mold, add more treasures; repeat. Let dry. Dig w/old forks/spoons/knives/hammer/etc to reveal treasures

69 Slides!  And notes!  Search words:  DNA, deoxyribonucleic acid, RNA, ribonucleic acid, chromosomes, nucleotide, Watson and Crick, nitrogen base,...

DNA (Deoxyribonucleic Acid), RNA, Protein Synthesis Powerpoint & Notes

69 Slides! And notes! Search words: DNA, deoxyribonucleic acid, RNA, ribonucleic acid, chromosomes, nucleotide, Watson and Crick, nitrogen base,...

This Modern Genetics PowerPoint Presentation has 20 slides on the following topics: Chemical Basis for Genetics, Nucleotides, Nitrogenous Bases of DNA, DNA Structure, DNA Replication, RNA - Ribonucleic Acid, Mutations, Human Genetic Diseases, Genetic Engineering, How to Clone a Sheep. $3.50

Modern Genetics PowerPoint Presentation Lesson Plan

This Modern Genetics PowerPoint Presentation has 20 slides on the following topics: Chemical Basis for Genetics, Nucleotides, Nitrogenous Bases of DNA, DNA Structure, DNA Replication, RNA - Ribonucleic Acid, Mutations, Human Genetic Diseases, Genetic Engineering, How to Clone a Sheep. $3.50

The Nitrogenous Bases of DNA and RNA

The Nitrogenous Bases of DNA and RNA

Basic Components of Nucleic Acids - Nitrogenous bases, Ribose and Phosphate group. The bases are Purines (A,G) and Pyrimidine (C,T,U). Ribose, Phosphate.    http://www.biochemden.com/basic-components-nucleic-acids-purines-pyrimidines

Basic Components of Nucleic Acids - Nitrogenous bases, Ribose and Phosphate group. The bases are Purines (A,G) and Pyrimidine (C,T,U). Ribose, Phosphate. http://www.biochemden.com/basic-components-nucleic-acids-purines-pyrimidines

molymod - The original dual-scale system of Molecular Models - DNA RNA. The advanced miniDNA® system comprises colour-coded, abstract-shaped parts designed to represent the nitrogenous bases, pentagonal sugar and pyramidal phosphate components needed to make a double-helix model of DNA.  The three hydrogen bonds that connect Cytosine to Guanine and the two that connect Thymine to Adenine are represented by the appropriate number of pegs.

molymod - The original dual-scale system of Molecular Models - DNA RNA. The advanced miniDNA® system comprises colour-coded, abstract-shaped parts designed to represent the nitrogenous bases, pentagonal sugar and pyramidal phosphate components needed to make a double-helix model of DNA. The three hydrogen bonds that connect Cytosine to Guanine and the two that connect Thymine to Adenine are represented by the appropriate number of pegs.

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