TLS Online TPP Program

#Id: 8550

#XL - Q Biochemistry

diisopropylphosphofluoridate, reacts with a serine OH group in the active site of esterases such as acetylcholinesterase/chymotrypsin, whilst the organomercury compound p-hydroxymercuribenzoate reacts with a cysteine group, in both cases resulting in covalent bond formation and enzyme inhibition.

TLS Online TPP Program

#Id: 8599

#XL - T Zoology

Cells commit to a new cell division at a specific point in G1 known as START or the restriction point.

TLS Online TPP Program

#Id: 8082

#XL - T Zoology

TLS Online TPP Program

#Id: 9672

#XL - T Zoology

In unstimulated cells, 

concentration of phosphoinositides is low, and PKB is

inactive because its PH domain physically blocks the kinase active site

TLS Online TPP Program

#Id: 9323

#XL - T Zoology

Terminate the visual response involves phosphorylation of activated (R*) rhodopsin, but not its dark (R) form