Answer: Light is absorbed during the light dependent reactions.
Sugar is produced during the carbon fixation reactions
Explanation: Photosynthetic reactions are divided into two phases: light dependent reactions and carbon fixation reactions.
Light dependent reactions are so named because they occur only when plants are illuminated. During light dependent reactions, sunlight is absorbed and it is used to split one molecule of water. This process is called photolysis of water and the energy is conserved in form of ATP and NADPH.
In carbon fixation reactions, ATP and NADPH produced in light dependent reactions are used to drive the incorporation of three molecules of carbon dioxide into ribulose 1,5- bisphosphate in a cyclic pathway known as Calvin cycle to produce triose phosphate sugar. Triose phosphate produced is used in the synthesis of glucose and other related molecules such as starch.
