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Bio Exam 4

flashcards

QuestionAnswer
What is initiation? RNA polymerase binds to a DNA region called the promote, unwinding the DNA to start RNA synthesis.
What is helicase Unwinds double helix by breaking the hydrogen bonds, creating a replication fork
Topoisomerase releases the torsional strain ahead of the forks.
What is DNA polymerase begin at RNA primers, main synthesis enzyme, add nucleotides only in 5'- 3' direction
What is the leading strand ?
Wha tis the lagging strand?
What is an Okazaki Fragment?
What is transcription? DNA to RNA
What is translation? RNA to protein - mRNA carries information from the DNA to the ribosomes
What are the Pyrimidines ? Cytosine and Thymine
What are the Purines? Adenine and Guanine
What is RNA polymerase? Enzyme that synthesizes RNA, Unwinds the DNA double helix locally. Reads 3' to 5' Synthesizes RNA 5' to 3'. does not require a primer
What is a promotor? code for where transcription begins
What is transcription Elongation?
What is transcription Termination?
What are Untranslated Regions DNA flanking the gene in prokaryotes and eukaryotes
What are Exons: Coding sequences are interrupted by non-coding sequences
What are Introns: " Intervening sequences" - removed from pre-m RNA
What are spliceosomes? location of splicing in the nucleus
What is tRNA? carries amino acids needed for polypeptide synthesis
what are codons?
Created by: user-1999759
 

 



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