A covalent radius is one-half the distance between the nuclei of two identical atoms.

TLS Online TPP Program

#Id: 5462

#Unit 7. System Physiology – Animal

Neurotrophins 

Necessary for survival and growth of neurons

In the CNS produced by astrocytes

TLS Online TPP Program

#Id: 3679

#Unit 3. Fundamental Processes

IF1 prevents tRNAs from binding to the portion of the small subunit that will become part of the A-site.

TLS Online TPP Program

#Id: 1418

#Unit 4. Cell Communication and Cell Signaling

Integrins are the principal receptors used by animal cells to bind to the extracellular matrix. 

 

TLS Online TPP Program

#Id: 3023

#Unit 3. Fundamental Processes

DNA polymerases cannot initiate DNA synthesis on duplex or single-stranded DNA without a primer.

TLS Online TPP Program

#Id: 8154

#Unit 2. Cellular Organization

Sar1 GTPase drives the pinching off of COPII vesicles

ARF GTPase drives the pinching off of COPIvesicles

Dynamin GTPase drives the pinching off of clathrin-coated vesicles