Someone please help me

Why is it important that fibrin is insoluble in water?

Which of the following processes does the body not use protein to perform? a. repairing muscles b. producing hormones c. making hemoglobin d. creating amino acids

Which of the following mental illness does not begin during adolescence? a. post-traumatic stress disorder b. obsessive-compulsive disorder. c. schizophrenia. d. addictions