Which of the Following Statements About Insulin Is INCORRECT

question 3

Multiple Choice

Which of the following statements about insulin is INCORRECT?

• A) In the active form it has two polypeptide chains joined by disulphide bonds.
• B) It is synthesized as a random coil single chain on membrane-bound ribosomes.
• C) The leader sequence is cleaved off after membrane transport.
• D) The disulphide bonds form after the final proteolytic cleavage to yield mature insulin.
• E) It is stored in the pancreas in an inactive form.

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