During infection, most bacteria remain in extracellular spaces and use a specialized mechanism, the type III secretion system (T3SS)

TLS Online TPP Program

#Id: 5033

#Unit 3. Fundamental Processes

The structure of FtsZ resembles tubulin

FtsZ has GTPase activity, and GTP cleavage is used to support the oligomerization of FtsZ monomers into the ring structure.

TLS Online TPP Program

#Id: 7074

#Unit 3. Fundamental Processes

 Valyl-tRNA synthetase can sterically exclude isoleucine from its catalytic pocket because isoleucine is larger than valine. In contrast, valine should slip easily into the catalytic pocket of the isoleucyl-tRNA synthetase. Although both amino acids will fit into the isoleucyl-tRNA synthetase amino acid–binding site, interactions with the extra bonding with tyrosine’s OH group. Since no other amino acid resembles tyrosine, the enzyme can do without an editing function

TLS Online TPP Program

#Id: 3678

#Unit 3. Fundamental Processes

The initiation of prokaryotic translation commences with the small subunit and is catalyzed by three translation initiation factors called IF1, IF2, and IF3.

TLS Online TPP Program

#Id: 5470

#Unit 7. System Physiology – Animal

Synaptic delay is due to the time it takes for the synaptic mediator to be released and to act on the receptors on the membrane of the postsynaptic cell. 

The minimum time for synaptic delay is 0.5 ms

TLS Online TPP Program

#Id: 9643

#Unit 4. Cell Communication and Cell Signaling

Molecular Handcuff 

Phosphorylation of Raf is recognize by protein 14-3-3 dimer, which locks the autoinhibitory domain in a position where it blocks and inhibits the kinase active site