Nucleotide= Sugar + Phosphate group + Any Nitrogen Base

It means a nucleotide is actually the combination of deoxy or oxy ribose sugar; phosphate group attached to 5′ end of sugar & nitrogen base like Purines (Adenine, Guanine) ; Pyrimidines (Cytosine, Thymine [For DNA], Uracil [For RNA])

Nucleotides are the subunits that are linked to form the ribonucleic acid (RNA) and deoxyribonucleic acid (DNA), which serve as the cell’s storehouse of genetic information.

Free nucleotides play important roles in cell signaling and metabolism , serving as convenient and universal carriers of metabolic energy and high-energy electrons.

All nucleotides are composed of three parts: a five-carbon sugar, a phosphate, and a nitrogen-rich structure called a nitrogenous base. The sugar can be ribose, which is found in ribonucleotides and RNA, or deoxyribose, which is found in deoxyribonucleotides and DNA.

The only difference between these two sugars is that deoxyribose has one fewer oxygen atom than ribose. The five carbon atoms in the sugar are numbered sequentially. To distinguish these carbon atoms from those of the nitrogenous base, which are also numbered, they are designated as 1 (prime), 2 , and so on.

Source:

http://www.biologyreference.com/Mo-Nu/Nucleotides.html

Nucleotide= Sugar + Phosphate group + Any Nitrogen Base

It means a nucleotide is actually the combination of deoxy or oxy ribose sugar; phosphate group attached to 5′ end of sugar & nitrogen base like Purines (Adenine, Guanine) ; Pyrimidines (Cytosine, Thymine [For DNA], Uracil [For RNA])

Nucleotides are the subunits that are linked to form the ribonucleic acid (RNA) and deoxyribonucleic acid (DNA), which serve as the cell’s storehouse of genetic information.

Free nucleotides play important roles in cell signaling and metabolism , serving as convenient and universal carriers of metabolic energy and high-energy electrons.

All nucleotides are composed of three parts: a five-carbon sugar, a phosphate, and a nitrogen-rich structure called a nitrogenous base. The sugar can be ribose, which is found in ribonucleotides and RNA, or deoxyribose, which is found in deoxyribonucleotides and DNA.

The only difference between these two sugars is that deoxyribose has one fewer oxygen atom than ribose. The five carbon atoms in the sugar are numbered sequentially. To distinguish these carbon atoms from those of the nitrogenous base, which are also numbered, they are designated as 1 (prime), 2 , and so on.

Source:

http://www.biologyreference.com/Mo-Nu/Nucleotides.html

A nucleotide is a monomer (subunit) of a nucleic acid.

The genetic information of a cell is stored in molecules of deoxyribonucleic acid (DNA).

DNA is a polymer of nucleotides, that is, DNA is composed of a long strand of individual nucleotides.

Since a polymer of nucleotides is DNA, you can look at this the other way by noting than a nucleotide is a monomer of DNA.

A DNA nucleotide consists of three parts—a nitrogen base, a five-carbon sugar called deoxyribose, and a phosphate group.

There are four different DNA nucleotides, each with one of the four nitrogen bases (adenine, thymine, cytosine, and guanine).

The first letter of each of these four bases is often used to symbolize the respective nucleotide (A for adenine nucleotide, for example).

Two strands of nucleotides, paired by weak hydrogen bonds between the bases, form a double-stranded DNA molecule.

However, nucleotides are not present in just DNA. A nucleotide is really just a monomer of any nucleic acid, a category that also includes RNA (ribonucleic acid).

RNA differs from DNA in the following ways:

The sugar in the nucleotides that make an RNA molecule is ribose, not deoxyribose as it is in DNA.

The thymine nucleotide does not occur in RNA. It is replaced by uracil. When pairing of bases occurs in RNA, uracil (instead of thymine) pairs with adenine.

RNA is usually single-stranded and does not form a double helix as does DNA.