Very small amount of far-red light absorbed by Pr makes it impossible to convert Pfr entirely to Pr by broad spectrum far-red light. An equilibrium of 97% Pr and 3% Pfr is achieved. This equilibrium is termed the photostationary state.

TLS Online TPP Program

#Id: 8375

#Unit 2. Cellular Organization

Ca2+ dependence of vertebrate skeletal muscle contraction, depends on :

action potential

specialized accessory proteins Tropomyosin,

Troponin (T, I, and C)

TLS Online TPP Program

#Id: 9512

#Unit 6. System Physiology – Plant

Coronatine is involved in causing stomata to open after closing in response to PAMPs, as well as in interfering with salicylic acid (SA)‐mediated defense responses.

TLS Online TPP Program

#Id: 6311

#Unit 3. Fundamental Processes

he consequences of arrest can be catastrophic if the gene being transcribed is essential as no product will be made by the arrested polymerase, and that same enzyme will cause a roadblock to other polymerases attempting to transcribe the same gene.The cell has machinery that removes the arrested polymerase and at the same time recruits repair enzymes (in particular, the endonuclease Uvr(A)BC); the repair that follows is called transcription-coupled repair. Both polymerase removal and repair enzyme recruitment are performed by a single protein called TRCF.

TLS Online TPP Program

#Id: 1857

#Unit 3. Fundamental Processes

Constitutive active housekeeping genes and developmentally regulated genes have TATA-less promoters. 

 

TLS Online TPP Program

#Id: 1135

#Unit 2. Cellular Organization

Kinase in cell cycle-

CAK kinase- Activate CDKs

Wee1 kinase- Inhibit CDKs