According to the current hypothesis, the gradient in phototropin phosphorylation induces the movement of auxin to the shaded side of the coleoptile. Once the auxin reaches the shaded side of the tip, it is transported basipetally to the elongation zone, where it stimulates cell elongation. The acceleration of growth on the shaded side and the slowing of growth on the illuminated side (differential growth) give rise to the curvature toward light.

TLS Online TPP Program

#Id: 734

#Unit 3. Fundamental Processes

Initiation of replication in E.Coli at oriC starts with formation of a complex that ultimately requires six proteins: DnaA, DnaB, DnaC, HU, gyrase, and SSB

TLS Online TPP Program

#Id: 2934

#Unit 3. Fundamental Processes

oriC is hemimethylated and remains in that condition for approximately 13 minutes.

TLS Online TPP Program

#Id: 6812

#Unit 3. Fundamental Processes

RdRP has not yet been identified in mammalian cells, and high efficiency there likely results from the fact that slicing is catalytic— that is, each RISC can cleave several mRNAs.

TLS Online TPP Program

#Id: 5682

#Unit 7. System Physiology – Animal

Depolarization or hyperpolarization that is proportional to the degree to which the direction is toward or away from the kinocilium

 

TLS Online TPP Program

#Id: 5850

#Unit 10. Ecological Principles

Island biogeography