BIO152H5 Chapter Notes - Chapter 16: Rna Polymerase Iii, Aminoacyl-Trna, Coding Strand

• School: UTM
• Department: Biology
• Course: BIO152H5
• Professor: Fiona Rawle

Document Summary

After rna polymerase binds dna with the help of other proteins, it catalyzes the production of an rna molecule whose base sequence is complementary to the base sequence of the dna template strand. Some sections of an rna are enclosed by gene regions called exons, while others are cncoded by gene regions called introns. During rna processing, introns are removed and the ends of the rna receive a cap and tail. Inside ribosomes, mrnas are translated to proteins via intermediary molecules called transfer rnas. Rnas carry an amino acid and have a three-base-pair anticodon, which binds to a three-base-long mrna codon. The amino acid carried by the transfer rna is then added to the growing protein via formation of a peptide bond. Mutations are random changes in dna that may or may not produce changes in the phenotype. Rna polymerase performs a template-directed synthesis in 5" " direction.