Q169 / 180 · AIIMS 2018 (27 May) · Zoology

Insulin receptors are

  • Correct answer
    A
    extrinsic proteins
  • B
    intrinsic proteins
  • C
    G-proteins
  • D
    trimeric proteins.

Solution

Insulin is a large polypeptide hormone and is insoluble in lipids, therefore, it cannot enter the target cell. It acts at the cell surface. It operates through extracellular membrane bound receptor, a heterotetrameric protein (extrinsic protein) on the target cell.

Hence, the correct answer is option: 'A'.

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