Which features influence the tensile strength of collagen? 1 the helix-like arrangement of collagen chains 2 the small R groups of amino acids in collagen 3 the insoluble character of collagen 4 the covalent links between collagen molecules
- A1, 2, 3 and 4
- B1 and 3 only
- C1, 2 and 4 only
- D2, 3 and 4 only