Core enzyme binds indiscriminately to any DNA. Sigma factor reduces the affinity for sequence independent binding and confers specificity for promoter.

TLS Online TPP Program

#Id: 5433

#Unit 7. System Physiology – Animal

Important factors in the establishment of the normal resting membrane potential:

Na+-K+ pump

K+ “leak” channels

TLS Online TPP Program

#Id: 5004

#Unit 6. System Physiology – Plant

During phytochrome-mediated leaflet closure, the apoplastic pH of the dorsal motor cells (the cells that swell during leaflet closure) decreases, while the apoplastic pH of the ventral motor cells (the cells that shrink during leaflet closure) increases. 

TLS Online TPP Program

#Id: 6816

#Unit 8. Inheritance Biology

The relation between genotype and phenotype is straight forward. Each genotype produces a single phenotype, and most phenotypes are encoded by a single genotype.

TLS Online TPP Program

#Id: 9069

#Unit 4. Cell Communication and Cell Signaling

Inactive PKA is a tetramer consisting of- 

two regulatory (R) subunits

two catalytic (C) subunits

TLS Online TPP Program

#Id: 516

#Unit 2. Cellular Organization

Escherichia coli K-12 is 4.6Mb genome with 4400 genes so gene density 950 genes/Mb.