In photosynthetic cells, synthesis of ATP by chemiosmosis occurs during (c) Photosynthesis and respiration.
Photosynthesis is the process of synthesizing one's own food. This process is seen in all the plants, some bacteria and algae. In plants, photosynthesis occurs in 2 phases: the light phase and the dark phase. ATP and NADPH production occurs in the light phase while glucose formation happens in the dark phase.
Respiration is the process of energy production for the plants to carry out their different processes. As in animals, plants also utilize their food and oxygen to respire. In most of the plants, respiration happens during the night.
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