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THE BACKBONE OF DNA IS FORMED OF NUCLEOTIDES LINKED BY PHOSPHODIESTER BOND.
A nucleotide consists of following three compounds
1. Pentose sugar :- It is a 5 membered ring sugar. Out of these 5 members four are carbon and one is oxygen. The pntose sugar in case of DNA is deoxyribose.
2. Nitrogen Base :- It is a nitrogen containg basic ring compound. They are broadly classified into 2 categories-Pyrines and pyrimidines. These are further divided into 5 nitrogen bases. They are Adenine,Guanine,Cytocine, Thymine, Uracil. Out of these 5 bases only four are present in DNA and only one occurs in it at a time.DNA does not have Uracil. The 7th or 9th nitrogen of the nitrogen base are linked to the 1st carbon of pentose sugar by glycosidic bond
3. Phosphate group :-It is a derivative of phosphoric acid and is attached to 5th carbon of pentose sugar by ester bond formed by dehydration synthesis
Two nucleotides in DNA are liked by phospho diester bond formed between -OH of phosphate group of one nucleotide and 3rd carbon of pentose sugar ofadjacent nucleotide.
Wiki User
∙ 14y ago
Wiki User
∙ 15y agoThe sugar-phosphate backbone, as its name implies, is the major structural component of the DNA molecule. The backbone is constructed from alternating ribose sugar and phosphate molecules which are highly polar. Because the backbone is polar, it is hydrophillic which means that it likes to be immersed in water. The other major portion of DNA is the internal bases. http://www.everythingbio.com/glos/definition.php?word=sugar-phosphate+backbone
Wiki User
∙ 9y agoThe sugar phosphate backbone is an important stuctural component of DNA. It consists of 5-carbon deoxyribose sugars and phosphate groups. These sugars are linked together by a phosphodiester bond, between carbon 4 of their chain, and a CH2 group that is attached to a phosphate ion.
Wiki User
∙ 14y agoIn DNA, on the outside, not the nitrogen bases, phosphate and sugar alternate the form the backbone of DNA.
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Why you add sodium acetate in dna extraction?
you add sodium acetate to neutralize the charge on the sugar-phosphate backbone of DNA
What is the function of phosphate group in DNA nucleotides?
The phosphate in DNA bonds the 5 sugars together, and is also a backbone for the DNA strand :D
The genetic information is coded in DNA by the regular alternation of sugar and phosphate molecules?
this is wrong. the answer should be "the genetic...dna by sequence of nucleotides"
What are three compounds of a DNA nucleotide?
The three components of DNA are: base, sugar, and phosphate. A molecule of DNA consists of two strands. Each strand is a linear series of nucleotides. Each nucleotide consists of a base (a purine or pyrimidine), a pentose (five-carbon sugar), and a phosphate group. The sugar is between the base and the phosphate. In a strand, nucleotides are combined through their sugars and phosphates, in such a way that alternating sugars and phosphates form a sugar-phosphate backbone. The bases project at right angles to this backbone.
Does nucleic acid have sugar phosphate backbone?
Yes it does
DNA sugar phosphate backbone?
Yes, sugar deoxyribose and a phosphate group forms the backbone in the DNA.
What is the sequence of subunits in the DNA backbone?
The sequence of subunits in the DNA backbone is phosphate, sugar, phosphate, sugar, phosphate, and sugar. The coding region is the code for protein sequence.
Does DNA has a sugar nitrogen backbone?
I believe not. I think it is a sugar phosphate backbone.
What forms the backbone of the DNA double helix molecule?
The backbone of a DNA chain is sugar and phosphate groups of each nucleotide.
What 2 substances make up the backbone or the sides of the DNA molecule?
The sugar-phosphate backbone of DNA is made up of deoxyribose (a sugar) and phosphate.
What two parts make up the back bone of DNA?
Phosphate and Deoxyribose sugar are the two parts that form the backbone of DNA. They are joined by ester bonds.
What is the sugar phosphate supporting structure of the DNA double helix called?
The sugar-phosphate supporting structure of the DNA double helix is called the backbone. This is why the DNA is commonly referred to as a double helix.
What is the backbone of DNA and RNA?
The backbone of DNA is made up of deoxyribose, a sugar, and are linked together by phosphodiester bonds. RNA is similar but the sugar is called ribose.
What makes up the backbone sides of DNA?
A ribose sugar linked by phosphate groups.
What are the 2 constant parts of DNA molecules?
The phosphate and deoxyribose in the backbone of DNA are constant throughout the molecule.
Is a phosphate DNA or RNA?
Both DNA and RNA contain a sugar phosphate group as the backbone to their structure. In DNA the sugar is deoxyribose, where as in RNA it is just ribose.
What are the two components that make up of the backbone of the DNA?
Sugar and phosphate are the parts that make up the DNA backbone.
