Polyhydroxyalkanoates (PHAs) are a common bacterial storage polymer, and these readily biodegradable polymers have many of the desirable properties of xenobiotic plastics.

A PHA copolymer containing equal amounts of poly-β-hydroxybutryate(PHB) and poly-β-hydroxyvalerate(PHV).

TLS Online TPP Program

#Id: 2297

#Unit 3. Fundamental Processes

Two bases in the non-template strand of the –10 element (A11 and T7) flip out from their base-stacking interactions and instead insert into pockets within the s protein where they make more favorable interactions

TLS Online TPP Program

#Id: 1765

#Unit 4. Cell Communication and Cell Signaling

The possibility of damage from self-reactive lymphocytes is further limited by the life span of activated lymphocytes, which is regulated by programs that induce cell death (apoptosis).

TLS Online TPP Program

#Id: 5639

#Unit 7. System Physiology – Animal

Blind spot  There are no visual receptors over the optic disk

TLS Online TPP Program

#Id: 922

#Unit 13. Methods in Biology

CFSE labeling amount of fluorescence emitted is cut in half each time the cell divides.

TLS Online TPP Program

#Id: 1462

#Unit 4. Cell Communication and Cell Signaling

The adhesiveness of cadherins depends on the presence of extracellular Ca2+.