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DNA and Protein

Transcription and Translation

QuestionAnswer
What is a gene? Entire nucleic acid sequence that controls the synthesis of a polypeptide or a functional RNA molecule
Describe the three steps of transcription 1. Initiation: RNA polymerase binds upstream at the promoter. Binding is aided by transcription factors. 2. Elongation: RNA polymerase uses nucleotide triphosphates to copy DNA strands using complementary base pairing. 3. Termination
Describe four steps which are necessary to prepare a newly synthesised mRNA molecule for translation 5' capping, RNA splicng, 3' polyadenylation, export
What does redundancy in the genetic code mean? First two bases of codon are usually the same
What is meant by a wobble? The first two bases of the codon bind tightly and the third is weakly bonded/ does not necessarily have to match
How are protein concentrations regulated? By regulating frequency protein is transcribed, how long mRNA lasts for, frequency mRNA is TRANSLATED and how long protein lasts before degradation
Created by: Yanna Lai Yanna Lai on 2009-08-06



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