In many bacteria glutamate is linked to tRNAGln by the same GluRS that synthesizes Glu–tRNAGlu. The resulting Glu–tRNAGln is then converted to Gln–tRNAGln by Glu–tRNAGln amidotransferase in an ATP-requiring reaction in which glutamine is the amide donor.

TLS Online TPP Program

#Id: 9317

#Unit 4. Cell Communication and Cell Signaling

TLS Online TPP Program

#Id: 8044

#Unit 1. Molecules and their Interaction Relevant to Biology

The order of priority of some common functional groups in amino acids is

TLS Online TPP Program

#Id: 4963

#Unit 6. System Physiology – Plant

Light-sensitive seed germination;

This provides energy for the germinating seed and also decreases the solute potential for water uptake necessary for providing the force for the radicle to push its way through the seed.

TLS Online TPP Program

#Id: 10148

#Unit 6. System Physiology – Plant

According to the current hypothesis, the gradient in phototropin phosphorylation induces the movement of auxin to the shaded side of the coleoptile. Once the auxin reaches the shaded side of the tip, it is transported basipetally to the elongation zone, where it stimulates cell elongation. The acceleration of growth on the shaded side and the slowing of growth on the illuminated side (differential growth) give rise to the curvature toward light.

TLS Online TPP Program

#Id: 9641

#Unit 4. Cell Communication and Cell Signaling

Downstream of Ras is a highly conserved cascade of three protein kinases-

Ras → Raf → MEK → MAP kinase