During photosynthesis light energy is converted into which form of energy?

• A. Electrical energy
• B. Thermal energy
• C. Kinetic energy
• D. Chemical energy

Answer: (D)

Light energy is captured by chlorophyll and used to drive the formation of ATP and NADPH in the light-dependent reactions. Those energy carriers store energy as chemical bonds, which is then used in the Calvin cycle to build carbohydrate molecules like glucose. So the energy from light ends up stored in the chemical bonds of sugars—chemical energy.

Electrical energy would imply energy stored as separated charges, not what is stored in sugar bonds. Thermal energy is released as heat rather than stored for later use, and kinetic energy is the energy of motion, which isn’t the form stored in the final products.