A young child is diagnosed with Duchenne muscular dystrophy. This X-linked recessive disorder is caused by a mutation in the gene encoding which protein?

A Collagen

B Dystrophin

C Fibrillin-1

D Spectrin

✓ Correct Answer: Option B

Duchenne muscular dystrophy is caused by mutations in the DMD gene, which encodes dystrophin, a crucial protein for maintaining the structural integrity of muscle fibers. Its absence leads to progressive muscle degeneration.

💡 Why is B) the correct answer?

The correct answer to the question "A young child is diagnosed with Duchenne muscular dystrophy. This X-linked recessive disorder is caused by a mutation in the gene encoding which protein?" is Option B: Dystrophin.

The other options — A) Collagen, C) Fibrillin-1, D) Spectrin — are incorrect for this USMLE Exam Prep question. As explained above: Duchenne muscular dystrophy is caused by mutations in the DMD gene, which encodes dystrophin, a crucial protein for maintaining the structural integrity of muscle fibers. Its absence leads to progres…

📚 About This USMLE Exam Prep Practice Question

This 3-level USMLE Exam Prep question from the Step 1 – Basic Sciences topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free USMLE Exam Prep practice test or use flashcards for spaced repetition review.

Practice USMLE Exam Prep Quizzes → Browse All Questions Study Flashcards

A young child is diagnosed with Duchenne muscular dystrophy. This X-linked recessive disorder is caused by a mutation in the gene encoding which protein?

✓ Correct Answer: Option B

📚 About This USMLE Exam Prep Practice Question

Related USMLE Exam Prep Questions