in mammalian cells, Cdt1 is targeted for degradation by the action of a protein complex that is recruited to the origin of replication by PCNA, the eukaryotic counterpart of the bacterial beta-clamp.

TLS Online TPP Program

#Id: 7753

#Unit 1. Molecules and their Interaction Relevant to Biology

Electron affinity: The enthalpy change that results from adding an electron to a gaseous atom.

Electron affinity is becoming less negative (less exothermic) and less likely to gain an electron. 

TLS Online TPP Program

#Id: 5264

#Unit 7. System Physiology – Animal

Phase 1 (initial repolarization), fast sodium channels close.

TLS Online TPP Program

#Id: 654

#Unit 3. Fundamental Processes

Reversal of the mutation can only be done by same mutagen which created forward mutation.

TLS Online TPP Program

#Id: 6984

#Unit 5. Developmental Biology

If a stem cell divides symmetrically, have the ability to produce either two stem cells (increasing the stem cell pool by one) or two committed cells (decreasing the pool by one). This is called symmetrical renewing or symmetrical differentiating.

TLS Online TPP Program

#Id: 6587

#Unit 7. System Physiology – Animal

Testosterone, secreted by the Leydig cells located in the interstitium of the testis, is essential for growth and division of the testicular germinal cells.