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2.2A Protein Synthes
2.2A protein synthesis transcription
Term | Definition |
---|---|
codon | a sequence of three mRNA nucleotides; these are read as a unit and code for a specific amino acid |
DNA sequence (genetic code) | (genetic code) refers to the arrangement of the four nitrogenous bases (A, T, C, and G) in a DNA double helix |
initiation | first step of the translation process, when a ribosome assembles at the AUG start codon on mRNA |
mRNA | formed by transcription; carries DNA's message from the nucleus to the cytoplasm |
promoter | specific DNA region where RNA polymerase begins opening up the double helix |
RNA polymerase | enzyme involved in transcription |
termination | end of translation of a polypeptide, when the ribosome reaches a stop codon; a release factor frees the polypeptide chain, and the ribosome disassembles |
transcription | the process by which a segment of DNA acts as a template for the formation of an RNA molecule (mRNA, tRNA, or rRNA) |