Question 34

(Multiple Choice)

Which pair is NOT matched correctly?


A) NtrC-regulates nitrogenase gene expression in response to NH4+ concentration
B) NtrB-phosphorylates NtrC when NH4+ concentration is low
C) NifL-forms a two-component signal transduction system with NtrC
D) NifA-acts in concert with factor σ -54
E) NifHDKTY-components of nitrogenase

Answer