Chapter 10 Key Terms 3

Chapter 10 Key Terms 3 - C4 plants. It acts prior to...

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light-harvesting complex A complex of proteins associated with pigment molecules (including chlorophyll a, chlorophyll b, and carotenoids) that captures light energy and transfers it to reaction- center pigments in a photosystem. Mesophyll (mez´-o-fil) The ground tissue of a leaf, sandwiched between the upper and lower epidermis and specialized for photosynthesis. mesophyll cell In C4 plants, a type of loosely arranged photosynthetic cell located between the bundle sheath and the leaf surface. NADP+ Nicotinamide adenine dinucleotide phosphate, An electron acceptor that, as NADPH, temporarily stores energized electrons produced during the light reactions. PEP carboxylase An enzyme that adds CO2 to phosphoenolpyruvate (PEP) to form oxaloacetate in
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Unformatted text preview: C4 plants. It acts prior to photosynthesis. Photophosphorylation (fo-to-fos-for-uh-la-shun) The process of generating ATP from ADP and phosphate by means of a proton-motive force generated across the thylakoid membrane of the chloroplast or the membrane of certain prokaryotes during the light reactions of photosynthesis. Photorespiration A metabolic pathway that consumes oxygen and ATP, releases carbon dioxide, and decreases photosynthetic output. Photorespiration generally occurs on hot, dry, bright days, when stomata close and the oxygen concentration in the leaf exceeds that of carbon dioxide....
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