In: Chemistry
Which of the following statements about insulin is INCORRECT?
| The leader sequence is cleaved off after membrane transport. | |
| 
 a.)  | 
The disulphide bonds form after the final proteolytic cleavage to yield mature insulin. | 
| b.) | It is stored in the pancreas in an inactive form. | 
| c.) | In the active form it has two polypeptide chains joined by disulphide bonds. | 
| d.) | It is synthesized as a random coil single chain on membrane-bound ribosomes. |