<u>Answer</u>:
C. Winds carry air pollution across oceans and continents.
Planet Earth has complex global wind and air current systems. Thus, air pollution produced in one place, will never remain there for ever. It some cases, due to wind patterns, the majority of the pollution may be carried away to some other place on the globe. This is why US should be concerned about air pollution in China. Even if the distance between the two countries is signinificant, it does not mean that US will remain unaffected by China's activity.
<h2>Protein folding </h2>
Explanation:
- Molecular chaperones bind to nascent and folding or misfolded proteins (through improperly exposed hydrophobic regions) and stabilize the polypeptide so it can fold into its native state
- They have the ability to prevent non-specific aggregation by binding to non-native proteins
- They play an important role in protecting cells from being damaged under environmental stress, such as extreme heat, poisoning, or mental stress
- Most common chaperones are heat shock proteins which are also called stress proteins
- The intracellular folding environment for proteins is chaotic because of the presence of other biomolecules, folding proteins, improper or fluctuating pH, heat, and other denaturants
- Chaperonins provide actual chambers for misfolded proteins to properly refold, segregating the protein from the chaotic cellular environment.
- The main key function of chaperonins is to assist in the folding of large protein molecules