Which cellular organelle is primarily responsible for the degradation of worn-out organelles and foreign particles taken up by phagocytosis?

A Mitochondria

B Endoplasmic reticulum

C Golgi apparatus

D Lysosomes

✓ Correct Answer: Option D

Lysosomes are membrane-bound organelles containing hydrolytic enzymes that break down cellular waste products, worn-out organelles, and foreign invaders (like bacteria) taken into the cell via phagocytosis, playing a crucial role in cellular recycling and defense.

💡 Why is D) the correct answer?

The correct answer to the question "Which cellular organelle is primarily responsible for the degradation of worn-out organelles and foreign particles taken up by phagocytosis?" is Option D: Lysosomes.

The other options — A) Mitochondria, B) Endoplasmic reticulum, C) Golgi apparatus — are incorrect for this USMLE Exam Prep question. As explained above: Lysosomes are membrane-bound organelles containing hydrolytic enzymes that break down cellular waste products, worn-out organelles, and foreign invaders (like bacteria) taken into the cell via phagoc…

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This 1-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.

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Which cellular organelle is primarily responsible for the degradation of worn-out organelles and foreign particles taken up by phagocytosis?

✓ Correct Answer: Option D

📚 About This USMLE Exam Prep Practice Question

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