Regulation of Transcription and Translation 0.0 / 5 ? BiologyDNA, genetics and evolutionA2/A-levelAQA Created by: bencook7Created on: 26-01-15 11:59 What can affect the expression of genes? Other molecules in the cell e.g. Oestrogen 1 of 12 How does Oestrogen affect transcription? It binds to a transcription factor called Oestrogen receptor, forming an Oestrogen-oestrogen receptor complex 2 of 12 Where is this complex found and where does it move to? From the Cytoplasm into the nucleus 3 of 12 What happens in the nucleus to this complex? It binds to specific DNA sites near the start of the target gene 4 of 12 What can the complex act as? Either as an activator, e.g. helping RNA polymerase, or as a repressor, e.g. blocking RNA polymerase 5 of 12 What does it depends on if the complex is either a repressor or an activator? It depends on the type of cell and the target gene 6 of 12 What does the level of Oestrogen in a particular cell affect? The rate of transcription of target genes 7 of 12 What can siRNA interfere with? Both the transcription and translation of the genes 8 of 12 How does siRNA affects the translation of a gene? Through a mechanism called RNA interference 9 of 12 In the cytoplasm and during the mechanism, what does siRNA and associated proteins bin too? The target mRNA 10 of 12 What do the proteins do to the mRNA in the mechanism, called RNA interference? They cut up the mRNA into sections so it can no longer be translated 11 of 12 What does the siRNA do to the specific gene? It prevents the expression of the specific gene as its protein can no longer be made during translation 12 of 12
Comments
No comments have yet been made