NEET 2019 · BiologyPrevious Year Question
Where is respiratory electron transport system (ETS) located in plants ?
Answer: (C) Inner mitochondrial membrane. Answer: (C) Inner mitochondrial membrane.
- A.Mitochondrial matrix
- B.Outer mitochondrial membrane
- C.Inner mitochondrial membrane✓
- D.Intermembrane space
Correct Answer
(C) Inner mitochondrial membrane
Solution & Explanation
Answer: (C) Inner mitochondrial membrane. Solution: The electron transport system, the chain of carriers (complexes I-IV plus ATP synthase) through which electrons pass from NADH/FADH2 to O2, is embedded in the inner mitochondrial membrane. The matrix is where pyruvate oxidation and the TCA cycle occur (generating the reduced coenzymes), while the outer membrane and intermembrane space do not house the ETS carriers. NCERT: Ch 12, p.159, line ~72: "present in the inner mitochondrial membrane".
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