What are the end products of dark reactions of photosynthesis?

The dark reactions of photosynthesis, also called the Calvin cycle or light-independent reactions, produce glucose (a simple sugar) as the primary end product, along with other important byproducts.

Main end products:

1. Glucose (C₆H₁₂O₆): The principal carbohydrate product that serves as an energy source and building block for more complex carbohydrates like starch and cellulose.
2. NADP⁺ (Nicotinamide adenine dinucleotide phosphate): The oxidized form of NADPH, which is recycled back to the light reactions.
3. ADP (Adenosine diphosphate) and inorganic phosphate (Pi): These are produced when ATP is used during the Calvin cycle and are returned to the light reactions for regeneration.

The process: Dark reactions occur in the stroma of chloroplasts and use the ATP and NADPH generated during light reactions to convert carbon dioxide (CO₂) into glucose through a series of enzyme-driven steps. Despite being called "dark" reactions, they can occur during daylight and depend indirectly on light through the availability of ATP and NADPH.

The glucose produced can be used immediately for energy through cellular respiration, converted to starch for storage, or used to synthesize other organic compounds needed by the plant.