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Nucleotide

Lizenzierung: Keine Angabe

A nucleotide is a repeating unit in a DNA or RNA chain. It consists of a sugar (ribose RNA, deoxyribose DNA), which has a base attached to its 3' end and a phosphate chain attached to its 5' end.

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Nucleoside

An organic molecule, consisting of a base (deoxyadenosine, deoxyguanosine, deoxycytidine, deoxythimidine) and a 2' deoxyribose. 

If a posphatechain is added, it becomes a deoxynucleotide.

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Purine

Adenine and Guanine

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Pyrimidine

Cytosine and thymine

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Adenine, A

Lizenzierung: Keine Angabe

Purine, pairs with the base Thymine in DNA and Uracil in RNA

Has the following structure: 

 

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Guanine

Lizenzierung: Keine Angabe

Purine, pairs with Cytosine. 

Has the following structure: 

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Cytosine

Lizenzierung: Keine Angabe

Pyrimidine, pairs with Guanine

Has the follwing structure: 

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Thymine

Lizenzierung: Keine Angabe

Pyrimidine, pairs with Adenine. Exists only in the DNA. 

Has the follwing structure: