Which statement is wrong about photorespirati | vedclass

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(C) Photorespiration is a wasteful process that occurs in $C_3$ plants. In this process,the enzyme $RuBisCO$ acts as an oxygenase,meaning it has an af

Vedclass · Accepted Answer

$RuBisCO$ has higher affinity for $CO_2$ than $O_2$.

Vedclass · Answer

(C) Photorespiration is a wasteful process that occurs in $C_3$ plants. In this process,the enzyme $RuBisCO$ acts as an oxygenase,meaning it has an affinity for $O_2$ when $O_2$ concentration is high and $CO_2$ concentration is low. Therefore,the statement '$RuBisCO$ has higher affinity for $CO_2$ than $O_2$' is technically incorrect in the context of the oxygenase activity that triggers photorespiration,as $RuBisCO$ actually has a significant affinity for $O_2$ under specific conditions,and the statement implies it never prefers $O_2$. More specifically,$RuBP$ binds with $O_2$ instead of $CO_2$ to form one molecule of phosphoglycerate and one molecule of phosphoglycolate (which is later converted to glycolate). Photorespiration does not produce $ATP$ or $NADPH$ and results in the loss of fixed carbon.

Which statement is wrong about photorespiration?

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In plant cells,peroxisomes are associated with which of the following?

$A -$ In the photorespiratory pathway,there is synthesis of $ATP$ or $NADPH$.
$R -$ In $C_4$ plants,photorespiration does not occur.

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