Kinase in cell cycle-

CAK kinase- Activate CDKs

Wee1 kinase- Inhibit CDKs

TLS Online TPP Program

#Id: 6108

#Unit 3. Fundamental Processes

In ames test reversal mutants are formed by same mutagen which caused forward mutation.

A more potent mutagen translates

into a greater number of revertant colonies

TLS Online TPP Program

#Id: 3033

#Unit 3. Fundamental Processes

The two cores have different abilities to dissociate from DNA. This corresponds to the need to synthesize 

a continuous leading strand (where polymerase remains associated  with the template) and 

a discontinuous lagging strand (where polymerase repetitively dissociates and reassociates)

TLS Online TPP Program

#Id: 1563

#Unit 4. Cell Communication and Cell Signaling

This is the example of post-translational modification by a lipid that mediates a ligand-receptor interaction.

TLS Online TPP Program

#Id: 6010

#Unit 3. Fundamental Processes

In mammalian cells, Cdc6 is controlled differently; it is phosphorylated during S phase, and as a result it is degraded by the ubiquitination pathway.  Cdt1 is initially stabilized by the protein Geminin, which prevents its degradation, and subsequent Geminin binding prevents its reuse

TLS Online TPP Program

#Id: 5175

#Unit 7. System Physiology – Animal

Most capillary walls are relatively impermeable to the proteins in plasma, and the proteins exert an osmotic force of about 25 mm Hg across the capillary wall (oncotic pressure) that pulls water into the blood.