Chapter 9: Photosynthesis Vocab Flashcards

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ATP

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Adenosine Triphosphate; Compound used by cells to store and release energy.

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Photosynthesis

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Process used by plants and other autotrophs to capture light energy and use it to power chemical reactions that convert carbon dioxide and water into oxygen and energy-rich carbohydrates such as sugars and starches.

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Pigment

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Light-absorbing molecule used by plants to gather the sun's energy.

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Chlorophyll

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Principle pigment of plants and other photosynthetic organisms.

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Thylakoid

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Saclike photosynthetic membranes found in chloroplasts.

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Stroma

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Fluid portion of the chloroplast; outside of the thylakoid.

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NADP+

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Carrier molecule that transfers high-energy electrons from chlorophyll to other molecules.

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Light-Dependent Reactions

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Set of reactions in photosynthesis that use energy from sunlight to produce ATP, NADPH, and oxygen.

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Light-Independent Reactions (Calvin Cycle)

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Set of reactions in photosynthesis that do not require light; energy from ATP and NADPH is used to build high-energy compounds such as sugar.

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Photosystem

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Cluster of chlorophyll and proteins found in the thylakoids.