Species in a community are found together because they depended on each other or simply because they have similar habitat needs.

TLS Online TPP Program

#Id: 7796

#Unit 2. Cellular Organization

Ran dependent mechanism for nuclear export of cargo proteins containing a leucine-rich nuclear-export signal (NES).

TLS Online TPP Program

#Id: 5065

#Unit 3. Fundamental Processes

SeqA mutants reduce the delay in remethylation at both oriC and dnaA. As a result, they initiate DNA replication too soon, thereby accumulating an excessive number of origins.

TLS Online TPP Program

#Id: 10082

#Unit 4. Cell Communication and Cell Signaling

The binding of integrins to their ligands depends on extracellular divalent cations(Ca+2 & Mg+2)

TLS Online TPP Program

#Id: 8465

#Unit 1. Molecules and their Interaction Relevant to Biology

The magnitude of this dipole moment corresponds to about 0.5-0.7 unit charge at each end of the helix. These charges would be expected to attract ligands of opposite charge and negatively charged ligands, especially when they contain phosphate groups and frequently bind at the N-termini of a helices. In contrast, positively charged ligands rarely bind at the C-terminus

TLS Online TPP Program

#Id: 2452

#Unit 3. Fundamental Processes

In the absence of allolactose, the repressor is present in a form that binds its site on DNA (and so keeps the lac genes switched off ).