Flashcards in Lecture 16 Deck (17):
What is the process by which DNA directs protein synthesis?
What are the 2 stages of gene expression?
transcription and translation
What is transcription?
the synthesis of RNA using information in DNA
What is translation?
the synthesis of a polypeptide using information in the mRNA
Where does translation happen in prokaryotes?
cytoplasm, it can begin before transcription is finished
What is the concept that cells are governed by cellular chain of commands?
What is the series of nonoverlapping three-nucleotides words?
What is the sequence where RNA polymerase attaches?
promoter (including the TATA box)
What mediate the binding of RNA polymerase?
What is the first stage of transcription?
What is the second stage of transcription?
What is the last stage of transcriotion?
What is the complete assembly of transcription factors and DNA polymerase 2 called?
transcription initiation complex
In eukaryotes what is attached at the 5' end? what about the 3' end?
5' cap and the poly-a tail
What are the functions of those modifications?
- facilitate export
-protect mRNA from hydrolytic enzymes
- help ribosomes to attach at 5' end
What removes introns and joins exons?