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Simplified photorespiration and Calvin cycle. Photorespiration (also known as the oxidative photosynthetic carbon cycle, or C2 photosynthesis) is a process in plant metabolism which attempts to reduce the consequences of a wasteful oxygenation reaction by the enzyme RuBisCO.
aerobic respiration noun [U]. âº biology a âchemical âprocess in which âenergy is âproduced in the âbody from âfood by using âoxygen. (Definition of aerobic respiration from the Cambridge Academic Content Dictionary Â© Cambridge University Press).