BY 108 Chapter Notes - Chapter 15: Central Dogma Of Molecular Biology, Transfer Rna, Reading Frame
Document Summary
Ribosomes - rna-protein complexes that make polypeptides. Rna acts as main catalytic unit, ribosomal proteins has structural role. Protein synthesis occurs at p, a, and e sites. Ribosomal rna (rrna) - type of rna in ribosomes. Provides the site where polypeptides get assembled transfer rna (trna) - transports/positions amino acids. Messenger rna (mrna) - long rna strands transcribed from dna. Reads genetic messages in dna and produces the proteins that the dna asks for central dogma - aka gene expression; info passes dna > rna > proteins transcription - transfer of info from dna to rna. Starts when rna polymerase binds to promoter binding site. Creates complementary transcript (uracil in place of thymine) translation - transfer of info from rna to protein. Each group of 3 nucleotides codes for an amino acid. Rrna reads the mrna to make the polypeptide chain genetic code - consists of codons (blocks of information) Supports belief that all organisms have the same root.
