Moderate

Kreb's cycle does not occur in______________?

Correct answer: B. RBC

  • A. Muscle
  • B. RBC
  • C. Heart
  • D. All of the above

Explanation

Mature red blood cells lack mitochondria, so they cannot carry out the mitochondrial TCA cycle and depend on glycolysis for ATP. Muscle and heart cells contain mitochondria and perform the TCA cycle.

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