BIO 101 Lecture Notes - Lecture 12: Transcription Preinitiation Complex, Start Codon, Transfer Rna
Document Summary
The link between dna and protein: dna contains the molecular blueprint of every cell (instruction manual, proteins control cell shape, function, reproduction, and synthesis of biomolecules. They are the construction workers of the cell (enzymes!: therefore, there must be a flow of information from dna to protein. Most genes contain the information for the synthesis of a single protein: experiments on bread molds in the 1940s showed that one gene codes for one protein. Cells synthesize three major types of rna that are required for protein synthesis: mrna: the base sequence that carries the information for the amino acid sequence of a protein. Genetic information flows from dna to rna to protein: transcription: 1st stage that produces an mrna with a nucleotide sequence complementary to one of the. Initiation: rna polymerase binds to the promoter region of dna near the beginning of a gene, separating the double helix near the promoter.
