what is the structure of dna? and what does it make up?
2007-06-14 14:50:59 · 7 answers · asked by Garn-El-Capitan 3 in Science & Mathematics ➔ Botany
DNA has a double helix structure because it is a two stranded helical structure.It is composed of polynucleotide.
Polynucleotides are made up of nucleotides.
Nucleotides are nucleosides + phosphate groups
nucleosides are pentose sugar + heterocyclic nitrogen base.
In DNA the pentose sugar is Deoxyribose sugar thats why the name Deoxyribonucleic acid.
The heterocylic nitrogen bases are purines - double ringed nitrogen bases and pyrimidines - single ringed nitrogen bases.
Purines are adenine and guanine, pyrimidines are cytosine and thymine.
The nucleotide is formed by a nitrogen base ( A,T,G,C) attached to the Deoxyribose sugar through N - glycosidic linkage, The phosphate group is liked to the sugar through phospho mono ester bond.
The nucleotide is liked to the next nucleotide by phosphodiester bond and to the adjacent, lateral nucleotide ( forming the other strand of DNA) through Hydrogen bonds between the nitrogen bases. This forms the chain of double stranded polynucleotides or DNA which is twisted like a helical ladder .
2007-06-14 22:51:32 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Deoxyribonucleic acid or DNA is a double stranded molecule in a helical form, "a double helix". DNA is the basis of heredity, composed of necleotides with base pairs A-T, G-C and hydrogen bonds form the cross linkage.
Note sure what your are looking for but I hope this helps
2007-06-14 22:11:59 · answer #2 · answered by nache 2 · 0⤊ 0⤋
DNA is the name of the chemical that stores genetic information. DNA makes up the chromosomes that are in the nucleus of every cell in your body. DNA is in the shape of a double helix.
The image below shows what a section of a DNA molecule looks like.
2007-06-14 22:08:07 · answer #3 · answered by karana 4 · 0⤊ 0⤋
DNA is double stranded structure which is composed of A,G,C,T and phosphate.DNA is a small part of chromosome.it makes a gene ,genetic code.
2007-06-15 05:19:00 · answer #4 · answered by D Gajjar 1 · 0⤊ 0⤋
A twisted ladder (double helix) Makes up your genetics, your appearance, traits, etc.
2007-06-14 21:58:13 · answer #5 · answered by Tatiana. 3 · 0⤊ 0⤋
Well its a double helix!
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2007-06-14 21:59:40 · answer #6 · answered by DuSteDShaDoW 4 · 0⤊ 0⤋
double helix.gene code
2007-06-14 21:53:55 · answer #7 · answered by glenn t 7 · 0⤊ 0⤋