The need for rho factor in vitro is variable. Some (rho-dependent) terminators require relatively high concentrations of rho, whereas others function just as well at lower levels. 

TLS Online TPP Program

#Id: 555

#Unit 2. Cellular Organization

The calcium-dipicolinic acid complex play a role in the heat resistance of endospore.

TLS Online TPP Program

#Id: 8419

#Unit 10. Ecological Principles

The age structure of a population is the proportion of individuals that occurs in different age classes.

TLS Online TPP Program

#Id: 6024

#Unit 3. Fundamental Processes

DNA polymerase a is unusual because it has the ability to initiate a new strand. It is used to initiate both the leading and lagging strands. 

The enzyme exists as a complex consisting of a 180-kD catalytic (DNA polymerase) subunit, which is associated with three other subunits: the B subunit that appears necessary for assembly, and two small subunits that provide the primase (RNA polymerase) activity.  It has dual capacity to prime and extend chains, this complex is often called pol a/primase.

TLS Online TPP Program

#Id: 513

#Unit 2. Cellular Organization

Cot1/2 is concentration of ssDNA left after time t. T1/2 is time taken for half renaturation.

TLS Online TPP Program

#Id: 1467

#Unit 4. Cell Communication and Cell Signaling

Epithelial-to-mesenchymal transition is associated with a reduction in the expression of E-cadherin.