The complex of IXa and VIIIa activate factor X. 

TLS Online TPP Program

#Id: 9018

#Unit 6. System Physiology – Plant

When dark‐treated chloroplasts are exposed to light

activate enzymes of the Calvin–Benson cycle that require Mg2+ for catalysis and are more active at pH 8 than at pH 7 for STROMA

TLS Online TPP Program

#Id: 7942

#Unit 2. Cellular Organization

TLS Online TPP Program

#Id: 8474

#Unit 1. Molecules and their Interaction Relevant to Biology

β Sheets in proteins contain 2 to as many as 22 polypeptide strands, with an average of 6 strands. 

Each strand may contain up to 15 residues, the average being 6 residues.

TLS Online TPP Program

#Id: 2880

#Unit 13. Methods in Biology

The denser a biological structure is, the faster it sediments in a centrifugal field.

TLS Online TPP Program

#Id: 9327

#Unit 4. Cell Communication and Cell Signaling

The binding of arrestin to rhodopsin speeds up the inactivation process.