Free NXF1 and NXT1 proteins are recycled back into the nucleus by the Ran-dependent import process.

TLS Online TPP Program

#Id: 2977

#Unit 3. Fundamental Processes

In yeast, the combined action of Cdc6, Cdtl, and the MCM proteins provides the licensing function.

TLS Online TPP Program

#Id: 7744

#Unit 1. Molecules and their Interaction Relevant to Biology

An ionic radius is one-half the distance between the nuclei of two ions in an ionic bond.

TLS Online TPP Program

#Id: 4699

#Unit 11. Evolution and Behavior

Altruism in social insects(haplodiploidy) Workers, rarely reproduce themselves but instead help one reproductive female (the queen) to raise offspring, a phenomenon called eusociality.

TLS Online TPP Program

#Id: 559

#Unit 2. Cellular Organization

The O1 operator extends from position -5 just upstream of the mRNA start point to position +21 within the transcription unit.

TLS Online TPP Program

#Id: 5198

#Unit 7. System Physiology – Animal

Thrombin is a serine protease that is formed from its circulating precursor, prothrombin, by the action of activated factor X.