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The tennis-racket-shaped particles on the inner mitochondrial membrane that take part in ATP synthesis are the:
AOxysomes
BPorins
CRibosomes
DSphincters
Answer & Solution
Correct answer: A. Oxysomes
1. The inner mitochondrial membrane bears minute regularly spaced particles.
2. These particles are tennis-racket shaped.
3. They are called oxysomes or F1 particles.
4. Oxysomes take part in ATP synthesis, so option A is correct.
5. Option B porins are channel proteins of the smooth outer membrane, the trap.
6. Option C ribosomes are protein-making particles in the matrix, so they are wrong.
7. Option D sphincters are muscular rings of the leech crop, unrelated here.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 12 Plant Anatomy and Plant Physiology "Structure of Mitochondria", p.190_
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