Both uracil and thymine pair with adenine, but they differ in their chemical ... One type of mutation, called a point mutation, occurs when a single nucleotide is changed. In RNA, a point mutation can ...

Biologically active RNAs, including transport, ribosomal and small nuclear RNA (tRNA, rRNA, snRNAs) fold into unique structures guided by complementary pairing between nucleotide bases.

In DNA and RNA, purines pair with their complementary pyrimidine bases through ... and the synthesis of complex molecules. GTP is another purine nucleotide that plays a crucial role in cellular ...