Question

What is nucleotide?

What is nucleoside 

Uridine present in RNA is. ...

Nucleic acids are a polymer of nucleotide monomeric units. ...

A DNA segment contains 100 Adenine and 100 cytosines, how many nucleotides are present in the segment? ...

Nucleoside contains. ...

ATP is a.

Answer 1

 Living organisms have a number of carbon compounds in which heterocyclic rings

can be found.

 When heterocyclic rings are attached to a sugar, they are called nucleosides.

 If a phosphate group is also found esterified to the sugar they are called

nucleotides.

 Nucleic acids like DNA and RNA consist of nucleotides only.

Heterocyclic Rings == A heterocyclic compound or ring structure is a cyclic compound

that has atoms of at least two different elements as members of its ring(s).

Ester == An organic compound made by replacing the hydrogen of an acid by an alkyl or

other organic group.

Nucleic Acids

 Nucleic acid is a macromolecule that is found in the acid insoluble fraction of any

living tissue.

 Together with polysaccharides and polypeptides these comprise the true

macromolecular fraction of any living tissue or cell.

 For nucleic acids, the building block is a nucleotide, i.e. nucleic acids are polymers

of nucleotides.

 Since nucleic acids are long chain polymers of nucleotides, they are also called

polynucleotides.

 The nucleotides are joined to one another in a chain by covalent bonds between the

sugar of one nucleotide and the phosphate of the next, resulting in an alternating

sugar-phosphate backbone.

 A nucleotide has three chemically distinct components. One is a heterocyclic

compound, the second is a monosaccharide and the third a phosphoric acid or

phosphate.

 The sugar found in polynucleotides is either ribose (a monosaccharide pentose) or

deoxyribose.

 The heterocyclic compounds in nucleic acids are the nitrogenous bases named

Adenine, Guanine, Uracil, Cytosine, and Thymine.