Extension of the acrosomal process by the polymerization of G-actin molecules into F-actin by RhoB

TLS Online TPP Program

#Id: 3370

#Unit 3. Fundamental Processes

A human member of the Y family of translesion polymerases (DNA Pol h) correctly inserts two A residues opposite a thymine dimer. 

TLS Online TPP Program

#Id: 8472

#Unit 1. Molecules and their Interaction Relevant to Biology

Poly(Gly) chains also adopt secondary conformations. 

In the solid state poly(Gly) has been shown to adopt two regular conformations designated I and II. 

State I has an extended conformation like a β strand whilst state II has three resides per turn and is similar to poly(Pro).

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: 5742

#Unit 10. Ecological Principles

Idiosyncratic hypothesis Community services change as the number of species increases or decreases, but that the direction of change is not predictable

TLS Online TPP Program

#Id: 7817

#Unit 10. Ecological Principles

Polar bears and seals have multiple layers of fat, plumage, or fur to keep warm.

Arctic birds often have thick layers of feathers.