BIOL 112 Lecture Notes - Lecture 3: Start Codon, Tata Box, Nuclear Membrane
Document Summary
Information content of dna is in form of specific sequences of nucleotides along the. Dna inherited by an organism leads to specific traits by dictating the synthesis of proteins. Gene expression: process by which dna directs protein synthesis o. Transcription: the synthesis of rna under the direction of dna; produces messenger rna (mrna) Translation: the actual synthesis of a polypeptide, which occurs under the direction of mrna; occurs on ribosomes. Primary transcript: the initial rna transcript from any gene prior to processing. Central dogma: the concept that cells are governed by a cellular chain of command: dna --> rna --> protein. In prokaryotes translation of mrna can begin before transcription has finished. In eukaryotic cell, the nuclear envelope separates transcription from translation. Eukaryotic rna transcripts modified through rna processing to yield the finished mrna. Flow of information from gene to protein is based on a triplet code. Triplet code: a series of nonoverlapping, three-nucleotide words in dna.
