Unit 3 Photosynthesis & Cellular Respiration

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ATP

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Usable energy for the cell. High energy-carrying molecule, Adenosine Triphosphate.

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ADP

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Potential to become ATP. Low energy-carrying molecule, Adenosine Di-Phosphate.

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Chemosynthesis

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Chemical energy is converted into carbohydrates for the organism's food.

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Photosynthesis

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The process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.

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Chlorophyll

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A pigment present in all green plants and a few other organisms that absorbs energy from the sun. It is required for photosynthesis.

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Thylakoid

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Membrane-bound compartment inside the chloroplast. Light-dependent reactions take place here.

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Light-Dependent Reaction

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Reaction that takes place in sunlight. Light is converted to chemical energy during this reaction.

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Light-Independent Reaction

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Reactions that are not required to occur in sunlight. Uses stored chemical energy to create a product that can be converted into glucose.

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Photosystem

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A mechanism in the thylakoids of plants that are responsible for performing light-dependent reactions.

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Electron Transport Chain

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A cluster of proteins that transfer electrons through a membrane within mitochondria to form a gradient of protons which creates ATP.