The answer probably lies in the fact that repression of the trp operon is weak—much weaker.

TLS Online TPP Program

#Id: 6859

#Unit 3. Fundamental Processes

Chromatin remodeling is tool for Epigenetic effects which result from modification of a nucleic acid after it has been synthesized or by the perpetuation of protein structures.

TLS Online TPP Program

#Id: 9283

#Unit 6. System Physiology – Plant

Three factors are important in maintaining low O2 concentrations in nodules. 

First, entry of O2 into the nodule is controlled by a variable‐permeability barrier in the nodule parenchyma

TLS Online TPP Program

#Id: 5308

#Unit 7. System Physiology – Animal

Isovolumetric Ventricular Contraction As soon as ventricular pressure exceeds atrial pressure, the AV valve closes. 

TLS Online TPP Program

#Id: 9944

#Unit 4. Cell Communication and Cell Signaling

Malaria (Parasitic)

Sporozoites enter the bloodstream by mosquito.

The sporozoites migrate to the liver, where they multiply, transforming liver hepatocytes into giant multinucleate schizonts, which release thousands of merozoites into the bloodstream. 

TLS Online TPP Program

#Id: 738

#Unit 3. Fundamental Processes

To identify DNA that is in the process of replicating, DNA derived from dividing cells is first cut with a restriction enzyme and separated on a 2D agarose gel.