Proteins are also known or chains

The amino acids in a polypeptide chain are linked by peptide bonds. Once linked in the protein chain, an individual amino acid is called a residue, and the linked series of carbon, nitrogen, and oxygen atomsare known as the main chain or protein backbone.

 1 amino acids  
2 polypeptide chain

Advection fog occurs when warm air blows over a cold surface like snow and since tropical water is warm advection fog rarely forms over it