This gradient is produced by the operation of the loops of Henle as countercurrent multipliers and maintained by the operation of the vasa recta as countercurrent

exchangers 

TLS Online TPP Program

#Id: 3311

#Unit 3. Fundamental Processes

Not only is nucleotide excision repair capable of mending damage throughout the genome, but it is also capable of rescuing RNA polymerase, the progression of which has been arrested by the presence of a lesion in the transcribed (template) strand of a gene, this phenomenon, known as transcription-coupled repair.

TLS Online TPP Program

#Id: 4519

#Unit 13. Methods in Biology

TLS Online TPP Program

#Id: 6323

#Unit 3. Fundamental Processes

Rho-dependent termination sites within a transcription unit are usually masked by translating ribosomes and therefore rho cannot act on downstream RNA polymerases

TLS Online TPP Program

#Id: 5978

#Unit 10. Ecological Principles

Productivity per day ( NPP per ground area per day )  Tropical forest > Temperate forest > Tropical savannas and grass land > Temperate grass land = Mediterranean shrub land >  Crops > Desert = Boreal forest > Arctic tundra 

Mediterranean shrub land = Desert > Arctic tundra >  Temperate grass land > Tropical forest > Tropical savannas and grass land >  Temperate forest > Crops > Boreal forest  

TLS Online TPP Program

#Id: 5761

#Unit 10. Ecological Principles

Berger-Parker index- Dominance indices are weighted toward the abundance of the commonest or dominant species

D_BP= N_max/N