#Question id: 4660
#Unit 3. Fundamental Processes
Two-component system regulating response to low Gln,
a) Glutamine dissociates from the sensor domain in the NtrB protein, leading to activation of a histidine kinase transmitter domain in NtrB
b) glutamine binds to a sensor domain of NtrB, causing a conformational change in the protein that inhibits its histidine kinase activity, the regulatory domain of NtrC blocks its DNA-binding domain from binding the glnA enhancers.
c) Activated transmitter domain of NtrB that transfers the γ-phosphate of ATP to a histidine residue (H), this phosphohistidine then transfers the phosphate to an aspartic acid residue (D) in the NtrC protein
d) This causes a conformational change in NtrC that unmasks the NtrC DNA-binding domain so that it can bind to the glnA enhancers
Which of the following combination is correct?
#Question id: 4661
#Unit 3. Fundamental Processes
In bacteria two components regulatory systems contain a domain can have function such as controlling the direction in which the bacterium swims in response to a concentration gradient of nutrients is known as
#Question id: 4662
#Unit 3. Fundamental Processes
Transcriptional activation by Pol II initiates transcription, polymerase pauses after transcribing fewer than 100 nucleotides due to the action of the elongation inhibitor such as
#Question id: 4663
#Unit 3. Fundamental Processes
Which two polymerases function in transcriptional repression directed by nuclear siRNAs in plants?
#Question id: 4664
#Unit 3. Fundamental Processes
Which one of the following statements about E.coli RNA poymerase is false?
#Question id: 4665
#Unit 3. Fundamental Processes
Mode of activation of rifampicin in E.coli is through