#Question id: 8843
#Unit 9. Diversity of Life Forms
The lowest level of biological organization that can perform all the activities required for life is the
#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: 594
#Unit 1. Molecules and their Interaction Relevant to Biology
The catalytic proficiency of an enzyme is the ________.
#Question id: 19492
#Unit 4. Cell Communication and Cell Signaling
#Question id: 307
#Unit 1. Molecules and their Interaction Relevant to Biology
An ionic compound A+ B– is most likely to be formed when________