When Phi is fixed at -80º. Clashes occur at all Psi angles except: 

(a) +10º to -55º for alpha helix

(b) +10º to -55º for beta strand 

(c) +90º to 180º for alpha helix

(d) +90º to 180º for beta strand

Choose which of the following is correct

#Question id: 4022

#Unit 3. Fundamental Processes

You are studying the effects of α-amanitin, a poisonous cyclic octapeptide, on eukaryotic cells and have noticed that following treatment, there is no miRNA transcription. Based on this evidence you conclude that α-amanitin must be inhibiting:

#Question id: 4023

#Unit 3. Fundamental Processes

Which of the following is a fundamental difference between gene regulation in bacteria compared with eukaryotes?

#Question id: 4024

#Unit 3. Fundamental Processes

All of the following statements about the essential carboxy terminal domain (CTD) of RNA polymerase are true except:

#Question id: 4025

#Unit 3. Fundamental Processes

You have identified a transcription factor and hypothesize that it binds to the promoter region of a gene that encodes a protein that causes cells to stop dividing. In order to test the interaction between the transcription factor and the DNA you will need to do a specific assay. Which one of the following would you use to test your hypothesis?

#Question id: 4026

#Unit 3. Fundamental Processes

The human genome encodes transcription factors that contain an acidic activation domain that is phosphorylated in response to increased levels of the second messenger cAMP. Which one of the following contains one of these activation domains?

#Question id: 4027

#Unit 3. Fundamental Processes

Enhancers are considered transcription-control elements that regulate the expression of eukaryotic genes. Which one of the following is true regarding these elements?