Epigenetics refers to:

A Changes in DNA sequence

B Heritable changes in gene expression without altering the DNA sequence

C Gene mutations

D Protein folding

✓ Correct Answer: Option B

Epigenetic modifications (methylation, histone modification) affect gene expression without changing DNA sequence.

💡 Why is B) the correct answer?

The correct answer to the question "Epigenetics refers to:" is Option B: Heritable changes in gene expression without altering the DNA sequence.

The other options — A) Changes in DNA sequence, C) Gene mutations, D) Protein folding — are incorrect for this PCAT Exam Prep question. As explained above: Epigenetic modifications (methylation, histone modification) affect gene expression without changing DNA sequence.

📚 About This PCAT Exam Prep Practice Question

This 3-level PCAT Exam Prep question from the Biological Processes 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 PCAT Exam Prep practice test or use flashcards for spaced repetition review.

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Epigenetics refers to:

✓ Correct Answer: Option B

📚 About This PCAT Exam Prep Practice Question

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