Answer: Yes, only the light dependent reactions of photosynthesis need light to proceed
Explanation: Photosynthetic reactions are divided into two: light dependent reactions and the light independent or carbon fixation reactions.
Light dependent reactions takes place only when plants are illuminated but carbon fixation reactions can take place in the dark. In light dependent reactions, energy absorbed from the sun is used to split a molecule of water and the solar energy is conserved in form of ATP and NADPH. The ATP and NADPH produced in light dependent reactions are used to drive the carbon fixation reactions. The splitting of water molecules by sunlight is known as photolysis of water.