Homo habilis – First tool maker

TLS Online TPP Program

#Id: 7200

#Unit 5. Developmental Biology

One individual, however, expresses only a small number of these molecules—up to six different class I molecules and 12 or more different class II molecules.

TLS Online TPP Program

#Id: 10077

#Unit 4. Cell Communication and Cell Signaling

An integrin molecule is composed of two noncovalently associated transmembrane glycoprotein subunits called α and β.

TLS Online TPP Program

#Id: 4789

#Unit 5. Developmental Biology

In embryos whose mothers have mutant glp-1, ABp is transformed into an ABa cell

TLS Online TPP Program

#Id: 1239

#Unit 7. System Physiology – Animal

ACTH (corticotropin) controls the secretion of cortisol by the activation of adenylyl cyclase via Galpha s.

TLS Online TPP Program

#Id: 6780

#Unit 3. Fundamental Processes

The mechanism of spacer sequence acquisition is as 

Each new spacer sequence is inserted next to the leader sequence, with the consequence that the array is a temporal record of acquisitions past. The sequence destined to become spacer is, within the phage genome, known as a “proto-spacer” and lies adjacent to a PAM sequence