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1. What is photosynthesis and where in a cell does it occur?
 
Photosynthesis is an  process in which carbon dioxide combined with  is converted into organic compounds inside containing cells utilising sunlight as an . During this process,  is released as a byproduct. All green portions of the plant, notably green leaves, participate in photosynthesis  It occurs in the  of plant cells.
 
2. What is respiratory quotient?
 
The ratio of the volume of  liberated, and the volume of   consumed during  is the .