All collagen family members consist of chains arranged in a

All collagen family members consist of peptide chains arranged in a parallel chain to an axis, forming the collagen fibers.

Explanation:

The term “collagen” is used to denote a family of 27 isoforms proteins found in the connective tissues of the body. It is the most important compound in the connective tissue and is an important structural element in multicellular organisms. It contains peptide chains amino acids glycine, proline, lysine, hydroxylysine, hydroxyproline, and alanine. These chains are organized in parallel to an axis, forming the collagen fibers, that provides strength and elasticity to the structure. The collagen molecule has 280 nm of length, with molecular weight 300,000 Da, stabilized by hydrogen bridges and intermolecular bonds.

i believe the correct answer is d