GENOME 361 Chapter Notes - Chapter 1: Rna Polymerase Ii, Eukaryotic Transcription, Tata Box
Document Summary
Genes can be expressed with different efficiencies, allowing the cell to make vast quantities of some proteins and tiny quantities of others. It is not uncommon to find other types of base pairs in. Rna: for example, g pairing with u occasionally. Rna contains the base uracil, which differs from thymine, the equivalent base in dna, by the absence of a -ch3 group. Dna and rna differ quite dramatically in overall structure. Whereas dna always occurs in cells as a double-stranded helix, rna is single-stranded. Rna chains fold into a variety of shapes; the ability to fold into complex three- dimensional shaped allows some rna molecules to have structural and catalytic functions. The rna chain produced by transcription is called the transcript. Because rna molecules are copied from only a limited region of the dna, rna molecules are much shorter than.
