Morphogen is a diffusable biochemical molecule that can determine the fate of a cell by its concentration.

TLS Online TPP Program

#Id: 9253

#Unit 6. System Physiology – Plant

TLS Online TPP Program

#Id: 7019

#Unit 5. Developmental Biology

Once stem cells become positioned farther from the niche, signaling factors cannot reach them, and differentiation commences.

TLS Online TPP Program

#Id: 5984

#Unit 10. Ecological Principles

Top-down control - Higher trophic levels determine the sizes of the lower trophic levels Bottom-up control - Size of a higher trophic level is determined by lower trophic level 

TLS Online TPP Program

#Id: 2287

#Unit 3. Fundamental Processes

How tightly does core enzyme v. holoenzyme bind DNA?

TLS Online TPP Program

#Id: 2390

#Unit 3. Fundamental Processes

Binding of SR proteins to ESEs promotes or stabilizes U1 binding to the 5’ splice site and U2AF binding to the 3’ splice site.