The culture medium provides the necessary nutrients, growth factors, and hormones for cell growth, as well as regulating the pH and the osmotic pressure of the culture.

TLS Online TPP Program

#Id: 6288

#Unit 3. Fundamental Processes

A consensus sequence is, in each case a version of the sequence having at each position the nucleotide (or amino acid) most commonly found there in different examples. Thus, the consensus sequence for promoters in E. coli recognized by RNA polymerase containing s70

TLS Online TPP Program

#Id: 2972

#Unit 3. Fundamental Processes

In yeast, Cdc6 is rapidly degraded during S phase, and as a result it is not available to support reloading of MCM proteins. Thus, the origin crumot be used for a second cycle of initiation during S phase.

TLS Online TPP Program

#Id: 7581

#Unit 5. Developmental Biology

Particular proteins or carbohydrates on the sperm surface are lost during capacitation because these compounds block the recognition sites for the sperm proteins that bind to the zona pellucida

TLS Online TPP Program

#Id: 6796

#Unit 3. Fundamental Processes

The pre-miRNA liberated by Drosha is exported to the cytoplasm, where the second RNA cleavage reaction, performed by Dicer, takes place. As with Drosha, 

Dicer selects its cleavage sites using a measuring, rather than sequence-specific, mechanism.

TLS Online TPP Program

#Id: 9346

#Unit 4. Cell Communication and Cell Signaling

The prodomains of TGF-β1 and TGF-β3 contain a RGD motif, that allows them to bind to integrins.