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How does ATP and NADPH connect light-dependent and light-independent reactions in photosynthesis? A.) ATP and NADPH are produced in both reactions B.) ATP and NADPH are used in both reactions C.) ATP and NADPH are produced in the light-dependent reaction and used in the light-independent reaction D.) ATP and NADPH are produced in the light-independent reaction and used in the light-dependent reaction

Whitney Matthews

in Biology

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1 answer

Kaitlin Dean on December 1, 2018

Answer:The correct answer would be C.) the ATP and NADPH produced in the light dependent reaction and used in the light independent reaction.The process of photosynthesis can be divided into two phases - the light-dependent reaction and light independent reaction (also called dark reaction and the bio-synthetic phase).Light dependent reaction takes place in the thyllakoid of the membrane which results in the formation of NADPH and ATP with the help of water and sunlight. During this phase of the photolysis of water takes place, which liberates electrons, protons, and oxygen (by-product). The electrons traveling through the electron transport chain and finally used in the reduction of NADP to NADPH. It also helps in the creation of the proton gradient through the thyllakoid membrane that is used in the production of ATP.Light-independent reaction/ dark reaction/ bio-synthetic phase / Calvin cycle, which takes place in the stroma of the chloroplast. It uses the energy from NADPH and ATP to fix carbon (obtained from carbon dioxide) in the food or glucose. Is catalyzed by an enzyme RuBisCO (Ribulose-1,5-bisphosphate carboxylase/oxygenase) and requires 6 of CO₂, 9 ATP and 6 of NADPH in order to fix 1 molecule of glucose.

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