C_4 plants are more efficient at photosynthes | vedclass

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(D) $C_4$ plants are more efficient than $C_3$ plants primarily because they lack photorespiration. In $C_3$ plants,the enzyme $RuBisCO$ acts as an ox

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Of the lower rate of photorespiration.

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(D) $C_4$ plants are more efficient than $C_3$ plants primarily because they lack photorespiration. In $C_3$ plants,the enzyme $RuBisCO$ acts as an oxygenase under high $O_2$ concentrations,leading to photorespiration,which results in the loss of fixed carbon and energy. $C_4$ plants have evolved a specialized anatomy called $Kranz$ anatomy,which separates the initial $CO_2$ fixation (in mesophyll cells) from the Calvin cycle (in bundle sheath cells). This mechanism increases the concentration of $CO_2$ around the $RuBisCO$ enzyme in the bundle sheath cells,effectively suppressing the oxygenase activity of $RuBisCO$ and thereby minimizing photorespiration.

$C_4$ plants are more efficient at photosynthesis than $C_3$ plants because........

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