ABCB19 mediates auxin movement to root tip.

ABCB4 regulates auxin levels in root hairs.

ABCB1-mediated nondirectional auxin movement in root and shoot

TLS Online TPP Program

#Id: 558

#Unit 2. Cellular Organization

There are 4 genes (I, Z, Y, A), 2 Promoters and 3 lac operators in Lac operon

The major O1 lac operator lies adjacent to promoter

Two auxiliary O2 and O3 lac operators 

All three operators are required for optimum repression 

TLS Online TPP Program

#Id: 8634

#Unit 2. Cellular Organization

At the metaphase to anaphase transition, APC/C bound to Cdc20 targets cyclins A /B and securin for degradation.

TLS Online TPP Program

#Id: 3032

#Unit 3. Fundamental Processes

DNA polymerase III holoenzyme assembles in stages, generating an enzyme complex that synthesizes the DNA of both new strands.\

Binding to DNA changes the conformation of the site on B that binds to the clamp loader, and as a result it now has a high affinity for the core polymerase.

First the clamp loader uses hydrolysis ofATPtobindbeta subunits to a template primercomplex.

Binding to DNA changes the conformation of the site on B that binds to the clamp loader, and as a result it now has a high affinity for the core polymerase.

tau. dimer binds to the core polymerase, and provides a dimerization function thatbinds a second core polymerase (associated with another B2 

TLS Online TPP Program

#Id: 1487

#Unit 4. Cell Communication and Cell Signaling

The tumor suppressor proteins p53 and Rb act as guardians of the cell cycle.

TLS Online TPP Program

#Id: 9589

#Unit 11. Evolution and Behavior