The force of attractin between the neighbouring peptide chains is

The force of attraction between the neighbouring peptide chains is

(A) Natural rubber is an elastomer. (R) The intermolecular forces of attraction between the polymer chains are weak van der Waals forces.

What is the predominant intermolecular force of attraction between the adjacent chains of polymer molecules in natural rubber?

Amino acids bonded together in long peptide chains form:

The sulphur containing essential amino acids bonded together in long peptide chains form

Which of the following structure represents the peptide chain ?