RNA polymerase holoenzyme binds DNA loosely at first

a. Binds at promoter initially

b. Scans along the DNA until it finds one

TLS Online TPP Program

#Id: 6305

#Unit 3. Fundamental Processes

The E. coli rrn promoters are also regulated by a pair of small molecules: the initiating NTP (the iNTP) and an alarmone,  guanosine 5 -diphosphate 3-diphosphate (ppGpp). An abundance of iNTP indicates that the concentration of  nucleotides is high, and therefore it is appropriate to synthesize plenty of rRNA. 

TLS Online TPP Program

#Id: 6437

#Unit 8. Inheritance Biology

TLS Online TPP Program

#Id: 5681

#Unit 7. System Physiology – Animal

When the bundle of processes is pushed in the opposite direction, the cell is hyperpolarized

 

TLS Online TPP Program

#Id: 2855

#Unit 13. Methods in Biology

The presence of several conjugated double bonds in organic molecules possess  p ®p* transitions in the UV/Vis range of the electromagnetic spectrum. Such molecules are very useful tools in colorimetric applications.

TLS Online TPP Program

#Id: 458

#Unit 2. Cellular Organization

Bromodomains recognize acetylated lysine.