Nitrogenous Base pairs & aromatic amino acids stack together through pi, pi-electronic interactions. These stacking interactions are best example of VWI.

TLS Online TPP Program

#Id: 8901

#Unit 2. Cellular Organization

Condensin association with chromosomes is facilitated by mitotic CDKs and Aurora B, which phosphorylate histone H2A, allowing condensins to bind chromatin.

TLS Online TPP Program

#Id: 6399

#Unit 2. Cellular Organization

trp operon can run even in the presence of repressor. The attenuation system permits another 10-fold control over the operon’s activity.  Thus, the combination of repression and attenuation controls the operon over a 700-fold range, from fully inactive to fully active: (70-fold [repression] X 10-fold [attenuation] = 700-fold). 

TLS Online TPP Program

#Id: 6247

#Unit 8. Inheritance Biology

TLS Online TPP Program

#Id: 8938

#Unit 2. Cellular Organization

The Mad1-Mad2 complex bound to a kinetochore adopts the active closed form (Mad2-C) and has the ability to convert inactive open Mad2 (Mad2-O) in the cytoplasm into active closed Mad2 is able to inhibit APC/Ccdc²⁰

TLS Online TPP Program

#Id: 3105

#Unit 3. Fundamental Processes

A replicated region appears as a bubble within nonreplicated DNA.