Question

what is difference between nucleotide and nucleoside ?

Answer 1

A nucleoside consists of a nitrogenous base covalently attached to a sugar (ribose or deoxyribose) but without the phosphate group. A nucleotide consists of a nitrogenous base, a sugar (ribose or deoxyribose) and one to three phosphate groups.

Nucleoside = Sugar + Base 
Nucleotide = Sugar + Base + Phosphate

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Answer 2

Understanding the fundamental differences between nucleotide and nucleoside is extremely important. The main distinction between the two is in their molecular makeup; nucleosides only contain sugar and a base, whereas nucleotides also contain a phosphate group. When it comes to RNA and DNA, a nucleotide comes first, while a nucleoside comes early.

They both serve as the foundation for nucleic acids because they contain the same elements as nucleotides, such as a nitrogenous base, a sugar, and a phosphate group. Even today, nucleotides remain a significant source of cancer-causing substances. Contrarily, nucleotides are primarily used in medicine to combat cancer-causing agents and viruses. Adenosine and guanosine are examples of nucleotides. The only difference between nucleosides and nucleotides is the presence of phosphate groups.

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