Activators can recruit factors needed for polymerase to initiate or elongate transcription. In all of these functions, the activator is merely recruiting proteins to the promoter. In bacteria, RNA polymerase is the only protein that needs to be recruited; this is not the case in eukaryotes. Indeed, in eukaryotes, a given activator might work in all three ways:

1.    Recruitment of nucleosome modifiers and remodelers	i.     “open” the promoter
2.    Recruitment of general transcription factors and mediators	ii.      That stimulate Pol II initiation and elongation
3.       Recruitment of protein complexes	iii.     To recruit PTEFb/SEC

TLS Online TPP Program

#Question id: 4663

#Unit 3. Fundamental Processes

Which two polymerases function in transcriptional repression directed by nuclear siRNAs in plants?

TLS Online TPP Program

#Question id: 11823

#Unit 6. System Physiology – Plant

_____A________the enzyme that catalyzes the conversion of AdoMet to ACC, while ___B_____ catalyzes the conversion of ACC to ethylene

TLS Online TPP Program

#Question id: 1918

#Unit 4. Cell Communication and Cell Signaling

In pancreatic carcinoma the ras gene:

TLS Online TPP Program

#Question id: 2056

#Unit 4. Cell Communication and Cell Signaling

A mother has an Rh- and the father an Rh+ blood type. The first baby born to the parents was Rh+ . However, the parents elect for the mother not to receive Rhogam. future babies of this couple at risk for

TLS Online TPP Program

#Question id: 26435

#Unit 3. Fundamental Processes

The eukaryotic MutS/L system is particularly important for repairing errors caused by