The similarity between Vit C & Vit K is: (A) Both help in conversion of proline to hydroxyproline, (B) Both help in post-translational modification, (C) Both have anti infective activity, (D) Both are involved in coagulation cascade
Answer is B. Both vitamin C and vitamin K are required for post-translational modification.
Vitamin C is required for post-translational modification of proline and lysine in collagen synthesis.
Vit K is required for post-translational modification of glutamate residue for generation of clotting factors.