The third base of each codon plays a lesser role in specifying an amino acid than the first two.

TLS Online TPP Program

#Id: 4019

#Unit 7. System Physiology – Animal

L-type calcium channels become inactivated (i.e., they close) within about 100 to 150 milliseconds after opening

TLS Online TPP Program

#Id: 1051

#Unit 5. Developmental Biology

Homeobox transcription factors, or Hox genes, play an essential role in specifying whether a particular mesenchymal cell will become stylopod, zeugopod, or autopod.

TLS Online TPP Program

#Id: 1986

#Unit 3. Fundamental Processes

RNA polymerases I or III do not have a CTD so no capping is stimulated

TLS Online TPP Program

#Id: 7562

#Unit 6. System Physiology – Plant

Cytokinin has been linked to the activation of a Cdc25- like phosphatase, whose role is to remove an inhibitory phosphate group from the Cdc2 kinase.  Cytokinins elevate the expression of the CYCD3 gene, which encodes a D-type cyclin

TLS Online TPP Program

#Id: 8072

#Unit 1. Molecules and their Interaction Relevant to Biology