MCAT Biochemistry Question 65: Answer and Explanation
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Question: 65
5. Steroid hormones are steroids that:
I. have specific high-affinity receptors.
II. travel in the bloodstream from endocrine glands to distant sites.
III. effect gene transcription by binding directly to DNA.
- A. I only
- B. III only
- C. I and II only
- D. I and III only
Correct Answer: C
Explanation:
Steroid hormones are produced in endocrine glands and travel in the bloodstream to bind high-affinity receptors in the nucleus. The hormone’s receptor binds to DNA, but the hormone itself does not.