🔬 Everyday Science

The citric acid cycle (Krebs cycle) takes place in:

A The cytoplasm
B The mitochondrial matrix
C The endoplasmic reticulum
D The nucleus

✓ Correct Answer: Option B

The citric acid cycle occurs in the mitochondrial matrix. Pyruvate enters mitochondria, is converted to acetyl-CoA, which enters the cycle producing NADH, FADH2, GTP, and CO2.

💡 Why is B) the correct answer?

The correct answer to the question "The citric acid cycle (Krebs cycle) takes place in:" is Option B: The mitochondrial matrix.

The other options — A) The cytoplasm, C) The endoplasmic reticulum, D) The nucleus — are incorrect for this Everyday Science question. As explained above: The citric acid cycle occurs in the mitochondrial matrix. Pyruvate enters mitochondria, is converted to acetyl-CoA, which enters the cycle producing NADH, FADH2, GTP, and CO2.

📚 About This Everyday Science Practice Question

This 2-level Everyday Science question from the Human Body & Biology topic is part of One Paper Preparation'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 Everyday Science practice test or use flashcards for spaced repetition review.

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