易混淆的单词： Uridine

Occurs in rna , thymine in dna , and adenine , guanine , and cytosine in both , as part of the nucleosides uridine , deoxythymidine , adenosine or deoxyadenosine , guanosine or deoxyguanosine , and cytidine or deoxycytidine .

核糖核酸中的尿嘧啶、去氧核糖核酸中的胸腺嘧啶和两者皆有的腺嘌呤、鸟嘌呤和胞嘧啶组成了核中尿、去氧胸腺、腺或去氧腺、鸟或去氧鸟和胞或去氧胞的一部分。