C_4 plants are more efficient in photosynthes | vedclass

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(D) $C_4$ plants are more efficient in photosynthesis compared to $C_3$ plants primarily because they have evolved a mechanism to minimize photorespir

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Lower rate of photorespiration

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(D) $C_4$ plants are more efficient in photosynthesis compared to $C_3$ plants primarily because they have evolved a mechanism to minimize photorespiration.In $C_3$ plants,the enzyme $RuBisCO$ acts as an oxygenase under high $O_2$ and low $CO_2$ concentrations,leading to photorespiration,which is a wasteful process that consumes energy and releases $CO_2$.$C_4$ plants utilize the $Kranz$ anatomy to spatially separate the initial $CO_2$ fixation (in mesophyll cells) and the $Calvin$ cycle (in bundle sheath cells).This mechanism ensures that $RuBisCO$ always operates in an environment with high $CO_2$ concentration,thereby suppressing the oxygenase activity of $RuBisCO$ and significantly reducing the rate of photorespiration.

$C_4$ plants are more efficient in photosynthesis than $C_3$ plants due to

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