Which statement about the structure of collagen is false? a. the modified prolines found in collagen are synthesized from proline post-translationally by an enzyme called prolyl hydroxylase. b. prolyl hydroxylase requires ascorbic acid (vitamin c) to maintain its activity. c. collagen include the nonstandard residue 3-hydroxylysine (hyl). d. the introduction of vitamin c containing limes to the diet of the british navy alleviated scurvy and led to the nickname "limey" for the british sailor. e. scurvy is a disease caused by vitamin c deficiency that results in weak collagen. f. collagen includes nonstandard residues like 4-hydroxyproline (hyp) and 3-hydroxyproline.