GRE Subject Test: Biochemistry, Cell, and Molecular Biology : Help with Hormones

Study concepts, example questions & explanations for GRE Subject Test: Biochemistry, Cell, and Molecular Biology

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Example Questions

Example Question #1 : Help With Hormones

Which of the following hormones will elicit a response in cells by attaching to a membrane bound receptor?

Possible Answers:

Insulin

Testosterone

Estrogen

Cortisol

Correct answer:

Insulin

Explanation:

Before answering this question, consider what types of hormones would not attach to a membrane bound receptor. Steroid hormones can simply diffuse through the plasma membrane, so they do not need to attach to a receptor there. Cortisol, testosterone, and estrogen are all steroid hormones. This leaves insulin as the only acceptable answer. In fact, insulin attaches to a receptor tyrosine kinase on the outside of cells.

All GRE Subject Test: Biochemistry, Cell, and Molecular Biology Resources

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