As Regards the Insulin Receptor, Which of the Following Statements

question 32

Multiple Choice

As regards the insulin receptor, which of the following statements, if any, is/are true?

• A) The active receptor is made up of 1 alpha chain and 1 beta chain.
• B) The alpha chain spans the membrane while the beta chain binds the insulin molecule.
• C) In addition to activating the intrinsic tyrosine kinase of the receptor, insulin binding also activates a phospholipase c and induces production of the phosphatidylinositol second messengers.
• D) A and C only.
• E) None of the above.

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