Question

an overview of photosynthesis
a key question what are the reactants and products of photosynthesis?
photosynthesis uses the energy of sunlight and products of carbon dioxide (low - energy reactants) to convert water and oxygen (products) into high - energy sugars.
light - dependent reactions the light - dependent reactions need sunlight. the sunlight energy is captured by pigments in the thylakoid membrane and is used to convert adp into atp and nadp+ into nadph. these sources of energy are important for other steps in photosynthesis. also, water is split apart, which makes more electrons available, and produced oxygen (o₂) and hydrogen ions (h+).
light - independent reactions the light - independent reactions (calvin cycle) occur in the stroma and do not use sunlight. the energy in atp and nadph, produced in the light - dependent reactions, is used to \fix\ carbon dioxide. that is, carbon dioxide (co₂) is combined with h+ to produce sugars, primarily glucose (c₆h₁₂o₆). the plant makes these sugars as food for itself.
visual reading tools: inside a chloroplast

1. fill in the reactants and products of the light - dependent and light - independent reactions of photosynthesis.

light - dependent reactions
light - independent reactions

1. what is the nadph responsible for?
2. where do the \light\ reactions (light - dependent) take place?

Explanation:

Step1: Identify reactants and products of light - dependent reactions

Reactants: Water ($H_2O$), ADP, $NADP^+$; Products: Oxygen ($O_2$), ATP, NADPH

Step2: Determine role of NADPH

NADPH is responsible for carrying high - energy electrons and hydrogen atoms to the light - independent reactions to help build sugar molecules.

Step3: Locate light - dependent reactions

The light - dependent reactions take place in the thylakoid membranes of the chloroplast.

Answer:

1. Light - Dependent Reactions: Reactants: Water ($H_2O$), ADP, $NADP^+$; Products: Oxygen ($O_2$), ATP, NADPH. Light - Independent Reactions: Reactants: Carbon dioxide ($CO_2$), ATP, NADPH; Products: Sugars (e.g., glucose $C_6H_{12}O_6$), ADP, $NADP^+$
2. Carrying high - energy electrons and hydrogen atoms to the light - independent reactions to help build sugar molecules.
3. Thylakoid membranes of the chloroplast.