Question

Photosynthesis in green plants occurs only during the day. Respiration in plants occurs:

• A. only at night
• B. only when there is enough ATP
• C. only during the day
• D. all the time

Answer 1

The correct option is D all the time

• photosynthesis is the process of formation of glucose as a source of food. It occurs only during the daytime since it requires sunlight.
  
• Respiration is the process of breakdown of glucose molecule into other organic substances for the purpose of growth of the plant and releases energy. Plants respire all the time, so respiration occurs whether its a day or night. In this process, plants take carbon dioxide from the environment and release oxygen.

So, the correct option is 'All the time'