Which of the following occurs when insulin molecules bind to their receptors on target cells?
A)increased mRNA synthesis in the target cells
B)minimal uptake of glucose by target cells
C)phosphorylation of proteins in the plasma membrane in the target cells
D)increased numbers of active transport molecules for glucose
E)phosphorylation of proteins in the plasma membrane in the target cells and increased numbers of active transport molecules for glucose

Question

Quizplus · Accepted Answer

When insulin molecules bind to their receptors on target cells, it triggers the phosphorylation of proteins in the plasma membrane of the target cells. This, in turn, leads to an increase in the number of active transport molecules for glucose, thereby increasing glucose uptake by the cells. Therefore, the correct answer is E - phosphorylation of proteins in the plasma membrane in the target cells and increased numbers of active transport molecules for glucose. Option A is incorrect because insulin binding does not directly affect mRNA synthesis. Option B is incorrect because insulin binding actually increases glucose uptake by the cells. Option C is partially correct, but it does not account for the increased glucose uptake that also occurs. Option D is also partially correct, but it does not account for the initial phosphorylation step that occurs in response to insulin binding.

Which of the Following Occurs When Insulin Molecules Bind to Their