Sample Questions — – "Do Plants Breathe?"
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MCQ
The structures in plants responsible for gaseous exchange are:
✅ Correct Answer: B
Gaseous exchange occurs through stomata and lenticels.
MCQ
Assertion (A): ATP acts as the energy currency in cells.
Reason (R): Energy released during respiration is directly used by cellular enzymes.
✅ Correct Answer: C
Energy is not directly used — it is first stored in ATP. ATP is then broken down when energy needs to be utilised.
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MCQ
Plants require ________ for respiration and release ________ as a byproduct.
✅ Correct Answer: A
Plants use O2 for respiration and release CO2.
MCQ
Compared to animals, the rate of respiration in roots, stems, and leaves of plants is:
✅ Correct Answer: D
Roots, stems and leaves respire at rates far lower than animals do.
MCQ
In stems, the ‘living’ cells responsible for gaseous exchange are organised:
✅ Correct Answer: B
In stems, the ‘living’ cells are organised in thin layers inside and beneath the bark.
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