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Photorespiration effects the efficiency of photosynthesisRUBISCO can either fix carbon dioxide or oxygen. So what happens if there is more oxygen present in the stroma than carbon dioxide? Oxygen is needed for cellular respiration in the mitochondria, but it's NOT GOOD thing to have in abundance in the chloroplast. If there is excess oxygen, RUBISCO will stick it on .... Then it will use that RuBP for .... down and generation of .... Breaking it down and liberating carbon dioxide will use a LOT of ATP and ///// but not generate .... until we fix the generated carbon dioxide using MORE ATP and NADPH. This makes an unhappy plant that is struggling to feed itself.
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