When the 5′ end of the siRNA of a RISC complex base-pairs precisely with a target mRNA over a distance of one turn of an RNA helix (10–12 base pairs), this domain of AGO2 cleaves the phosphodiester bond of the target RNA across from nucleotides 10 and 11 of the siRNA

TLS Online TPP Program

#Id: 3057

#Unit 10. Ecological Principles

Fast generation and high mutation rate in tropical leads to greater evolution rate. 

TLS Online TPP Program

#Id: 4692

#Unit 11. Evolution and Behavior

Reciprocity

When one individual provides a fitness benefit to another, as long as the second individual is likely to return the favor later.

TLS Online TPP Program

#Id: 2575

#Unit 7. System Physiology – Animal

Transport of water and solutes from the interstitial fluid into the peritubular capillaries occurs by ultrafiltration.

TLS Online TPP Program

#Id: 10136

#Unit 6. System Physiology – Plant

Auxin-induced proton extrusion acidifies the cell wall and increases cell extension

Auxin increase the rate of proton extrusion (wall acidification), and the kinetics of proton extrusion should closely match those of auxin-induced growth.

TLS Online TPP Program

#Id: 2618

#Unit 13. Methods in Biology

Type II restriction endonucleases are remarkably stable and induce cleavage either, in most cases, within or immediately outside their recognition sequences.