0
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.
Still curious? Ask our experts.
Chat with our AI personalities
Lao
Maxine
ReneThe sugar phosphate backbone of DNA refers to the alternating sugar (deoxyribose) and phosphate groups that form the outer structural framework of the DNA double helix. The phosphate groups link the sugar molecules together through phosphodiester bonds, forming a strong and stable structure that supports the nitrogenous bases in the DNA molecule.
The 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
The 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.
Add your answer:
Earn +20 pts
Does nucleic acid have sugar phosphate backbone?
Yes, nucleic acids have a sugar-phosphate backbone. The backbone is formed by a repeating pattern of sugar molecules (deoxyribose in DNA, ribose in RNA) connected to phosphate groups. The nitrogenous bases are attached to this backbone to form the overall structure of DNA and RNA.
How is the sugar phosphate backbone held together?
The sugar-phosphate backbone in DNA is held together by covalent bonds called phosphodiester bonds. These bonds link the 5' phosphate group of one nucleotide to the 3' hydroxyl group of the next nucleotide, forming a strong sugar-phosphate backbone that gives DNA its structural stability.
In DNA what do phosphate groups bond to?
Phosphate groups in DNA bond to sugar molecules through a phosphodiester bond to form the backbone of the DNA strand.
Does RNA contain a phosphate group like DNA?
Yes, RNA contains a phosphate group in its backbone, just like DNA. The phosphate group is important for forming the sugar-phosphate backbone that gives RNA its structure and stability.
Why are genes distinguished by bases but not by the sugar-phosphate backbone?
Genes are distinguished by the sequence of bases, not the sugar-phosphate backbone, because the sequence of bases determines the genetic information encoded in the DNA. The sugar-phosphate backbone forms the structural framework of the DNA molecule, helping to stabilize and protect the genetic information stored in the bases.
