Resact from Arbacia egg jelly binds to its receptor on the sperm, activates the receptor’s guanylyl cyclase (RGC) activity.

TLS Online TPP Program

#Id: 5730

#Unit 10. Ecological Principles

The Intermediate Disturbance Hypothesis Suggests Species Richness

Low rates of disturbance, competitively dominant species would outcompete all other species (K selected) At high levels of disturbance, species would be continually driven extinct and only good colonists and well disperse (r-selected) would persist. Intermediate disturbance, species richness is greatest in areas where disturbances are neither too large nor too small but are of intermediate size.

TLS Online TPP Program

#Id: 1643

#Unit 4. Cell Communication and Cell Signaling

Class II, presentation is inhibited by treatment of the cells with an agent that blocks endocytic processing within the cell (chloroquine).

TLS Online TPP Program

#Id: 9745

#Unit 6. System Physiology – Plant

According to Optimal Defense Hypothesis, 

Young tissues not only contain the highest levels of constitutive secondary compounds, they are also more responsive to herbivory. Thus, younger leaves exhibit more robust inducible defenses to herbivores than older leaves.

TLS Online TPP Program

#Id: 791

#Unit 3. Fundamental Processes

A rut site has a sequence rich in C -41% and poor in G preceding the actual site(s) of termination. The sequence corresponds to the 3’ end of the RNA.

 

TLS Online TPP Program

#Id: 9683

#Unit 4. Cell Communication and Cell Signaling

Loss of the PTEN protein contributes to the uncontrolled growth of cells.