A researcher seals a leafy shoot in an airtight, transparent container equipped with sensitive gas sensors and maintains it at a constant physiological temperature. When the researcher gradually dims the ambient light until the net exchange of carbon dioxide between the chamber air and the plant reaches zero, the plant remains fully viable. Which statement accurately describes the relationship between photosynthesis and cellular respiration in the plant tissue under these specific conditions?

A) Cellular respiration has ceased completely because mitochondrial activity is suppressed whenever photosynthetic light reactions slow down.

B) Photosynthesis is operating at its maximum biochemical velocity to store surplus sugars rather than fueling ongoing cellular maintenance.

C) The rate of carbon dioxide fixation by photosynthesis exactly balances the rate of carbon dioxide released by cellular respiration.

D) Photophosphorylation within chloroplasts satisfies all cellular energy demands, eliminating the requirement for mitochondrial ATP synthesis.

Relationship between photosynthesis and respiration Transitional Reasoning Practice

Biology · Cellular Energetics · Biology · Photosynthesis

1 Biology practice questions on Relationship between photosynthesis and respiration. Questions that build towards applied reasoning.

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Cellular Energetics · Biology

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