EVERYDAY SCIENCE

Detailed explanation-1: -The light reaction of photosynthesis occurs in the presence of light which results in photolysis of water and it occurs in the grana of the chloroplast. Photosystems are present in the grana which are involved in the light reaction. ATP produced during light reaction is used up in the dark reaction of photosynthesis.

Detailed explanation-2: -The light reactions of photosynthesis take place in the thylakoid membrane, whereas the dark reactions are located in the chloroplast stroma.

Detailed explanation-3: -What is Light Reaction? The light reaction is also known as photolysis reaction and takes place in the presence of light. It usually takes place in the grana of chloroplasts. The photosystems have pigment molecules.

Detailed explanation-4: -The light-independent reactions of photosynthesis take place within the stroma. It contains enzymes that work with ATP and NADPH to “fix” carbon from carbon dioxide into molecules that can be used to build glucose.

Detailed explanation-5: -The light-dependent reactions take place in the thylakoid membranes in the granum (stack of thylakoids), within the chloroplast. Figure: The two stages of photosynthesis: Photosynthesis takes place in two stages: light-dependent reactions and the Calvin cycle (light-independent reactions).