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CBSE Class 10 Answered

<div>How do desert plants prepare food and when?</div>
Asked by Kalita Padmanath | 16 May, 2015, 10:38: PM
Expert Answer
  • Desert plants have their stomata closed during the day to conserve water.
  • Light dependent and light independent reactions of photosynthesis occur only during the day.
  • Desert plants keep their stomata open at night. The exchange of gases occurs during the night time.
  • CO2 that enters the mesophyll cells of plants is fixed by the PEP carboxylase into malate.
  • Malate gets stored in other cell organelles such as vacuoles.
  • During the day, the malate is sent to the stroma of the chloroplasts.
  • It is broken down into CO2 and pyruvate.
  • CO2 then enters the Calvin cycle or light-independent reaction.
Answered by Hemangi Binny | 18 May, 2015, 10:45: AM
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