In RPLC stationary phase most commonly used is in the bonded-phase form, in which alkylsilane groups are chemically attached to silica. Butyl (C4), octyl (C8) and octadecyl (C18) silane groups are most commonly used.

TLS Online TPP Program

#Id: 2163

#Unit 11. Evolution and Behavior

An adaptation is a characteristic that enhances the survival or reproduction of organisms that bear it.

TLS Online TPP Program

#Id: 5922

#Unit 3. Fundamental Processes

The 5’–3’ exonuclease activity removes the RNA primer while simultaneously replacing it with a DNA sequence extended from the 3’–OH end of the next Okazaki fragment. 

TLS Online TPP Program

#Id: 7917

#Unit 2. Cellular Organization

Brown Adipose Tissue

is brown because of the presence of large numbers of mitochondria (high concentrations of cytochromes), with heme groups that are strong absorbers of visible 

TLS Online TPP Program

#Id: 2248

#Unit 11. Evolution and Behavior

These pieces— the exons —are separated by stretches of noncoding DNA— the introns

TLS Online TPP Program

#Id: 8191

#Unit 2. Cellular Organization

PTS1 signals are recognized by the peroxin Pex5 receptor

PTS2 signals are recognized by the peroxin Pex7 receptor

Neither targeting sequence is cleaved after import.