Biology – 6.1 Plant nutrition – photosynthesis | e-Consult

The statement is incorrect because while light is essential for photosynthesis, it is not the only factor. Photosynthesis requires light energy to drive the process, specifically the light-dependent reactions where light is absorbed by chlorophyll. However, the light-independent reactions (Calvin cycle), which fix carbon dioxide to produce glucose, can occur in the absence of light.

During the day, light provides the energy for the light-dependent reactions. At night, when there is no light, photosynthesis stops. However, some plants can continue to respire, using stored carbohydrates (produced during the day) to generate energy. This process is essentially the reverse of photosynthesis. Therefore, while photosynthesis doesn't occur at night, the plant can still utilize the products of photosynthesis made during the day.