Post-translational modifications of the CAAX motifs determine the subcellular localization and correct biological function of Ras proteins.

TLS Online TPP Program

#Id: 9626

#XL - T Zoology

Following binding of an EGF ligand, the rate of endocytosis of HER1 is increased about tenfold, and only a fraction of the internalized receptors return to the plasma membrane; the rest are degraded in lysosomes.

TLS Online TPP Program

#Id: 9283

#XL - Q Biochemistry

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: 2167

#XL - T Zoology

Natural selection is any consistent difference in fitness among different classes of biological entities.

TLS Online TPP Program

#Id: 8922

#XL - T Zoology

Centralspindlin-Ect2 complex catalyzes activation of RhoA, leading to cleavage furrow formation and division of the cytoplasm to form two completely separate cells.

TLS Online TPP Program

#Id: 10678

#XL - R Botany

Cork Cambium

Phellogen cuts off cells on both sides. The outer cells differentiate into cork or phellem, while the inner cells differentiate into secondary cortex or phelloderm.

Phellogen, phellem, and phelloderm are collectively known as periderm