C_4 plants are more photosynthetically effici | vedclass

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(D) $C_4$ plants are more efficient because they have evolved a mechanism to minimize photorespiration.In $C_4$ plants,the $CO_2$ released during phot

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The $CO_2$ generated during photorespiration is trapped and recycled by $PEP$ carboxylase.

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(D) $C_4$ plants are more efficient because they have evolved a mechanism to minimize photorespiration.In $C_4$ plants,the $CO_2$ released during photorespiration (if any occurs) or the $CO_2$ concentrated in the bundle sheath cells is efficiently refixed by the enzyme $PEP$ carboxylase.$PEP$ carboxylase has a very high affinity for $CO_2$ and does not bind with $O_2$,unlike $RuBisCO$.This mechanism ensures that $CO_2$ loss is minimized and the photosynthetic rate remains high even under conditions of low $CO_2$ concentration.

$C_4$ plants are more photosynthetically efficient than $C_3$ plants because:

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