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?

TLS Online TPP Program

#Question id: 3854

#Unit 3. Fundamental Processes

In prokaryotes, the presence of a protein called rho will:

TLS Online TPP Program

#Question id: 3855

#Unit 3. Fundamental Processes

In eukaryotes, which of the following modifications is made to a primary transcript prior to its transport out of the nucleus?

TLS Online TPP Program

#Question id: 3856

#Unit 3. Fundamental Processes

In eukaryotes, the conserved element closest to the transcription start site is called the:

TLS Online TPP Program

#Question id: 3857

#Unit 3. Fundamental Processes

The CAAT box is usually located near the position:

TLS Online TPP Program

#Question id: 3858

#Unit 3. Fundamental Processes

The 5' methyl guanosine caps added during RNA chain elongation performs what function?

1. prevents degradation by nucleases 

2. are recognized by protein factors

3. are used to identify the type of RNA

TLS Online TPP Program

#Question id: 3859

#Unit 3. Fundamental Processes

Polyadenylation is: