When the ratio of PSF relative to that of bacteria exceeds a certain threshold, cells stop proliferating and initiate the expression of genes that are required for their aggregation.

TLS Online TPP Program

#Id: 954

#Unit 5. Developmental Biology

When sulfated polysaccharide binds to its receptor on the sperm, activates 3 sperm membrane proteins: 

(1) A calcium transport channel

(2) A sodium-hydrogen exchanger

(3) A phospholipase enzyme (IP3)

TLS Online TPP Program

#Id: 10440

#Unit 4. Cell Communication and Cell Signaling

7,8-diol-9,10-epoxide is responsible for cancer development forms an adduct with guanine: 

(+)-trans-anti-B(a)P-N2-dG

TLS Online TPP Program

#Id: 5839

#Unit 10. Ecological Principles

Facilitation may be important in early seral stages and inhibition important in later ones or vice versa.

TLS Online TPP Program

#Id: 96

#Unit 5. Developmental Biology

Cytoplasmic Determinants are molecules, often transcription factors that regulate gene expression that directs the cell along a particular path of maturation.

TLS Online TPP Program

#Id: 8566

#Unit 1. Molecules and their Interaction Relevant to Biology

Under these conditions, the reactions have an identical dissociation constant Ki , again called the inhibitor constant.