The Calvin cycle creates glucose from carbon dioxide. In...

The Calvin cycle creates glucose from carbon dioxide. In order to do so, it needs a source of (provided by NADPH) and in order to create new covalent bonds (provided by $\overline{\text { ATP). Both NADPH and ATP are provided by the }}$ occurring on the thylakoid membranes.

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Key Concepts

Calvin Cycle

The Calvin cycle is a series of biochemical redox reactions occurring in the stroma of chloroplasts during photosynthesis. It is responsible for fixing carbon dioxide into organic molecules, such as glucose, by utilizing the energy and electrons provided by ATP and NADPH. This cycle forms the basis for the synthesis of carbohydrates that support plant growth and energy storage.

ATP

Adenosine triphosphate (ATP) is the universal energy currency of the cell. In the context of photosynthesis, ATP provides the energy necessary to drive various endergonic reactions, including the formation of new covalent bonds during the synthesis of carbohydrates in the Calvin cycle.

NADPH

NADPH is a critical reducing agent in photosynthetic processes. It supplies high-energy electrons and hydrogen ions needed for the reduction of carbon compounds in the Calvin cycle, facilitating the conversion of carbon dioxide into sugars.

Light-Dependent Reactions on Thylakoid Membranes

Light-dependent reactions occur within the thylakoid membranes of chloroplasts where sunlight is captured. These reactions harness solar energy to generate the chemical energy carriers ATP and NADPH, both of which are essential for powering the Calvin cycle and driving the synthesis of organic molecules.

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