Bundle sheath cells:

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(D) $C_4$ plants exhibit $Kranz$ anatomy. In $Kranz$ anatomy,the mesophyll is undifferentiated,and its cells are arranged in concentric layers around

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are rich in $RuBisCO$

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(D) $C_4$ plants exhibit $Kranz$ anatomy. In $Kranz$ anatomy,the mesophyll is undifferentiated,and its cells are arranged in concentric layers around the vascular bundles. The vascular bundles are surrounded by large bundle sheath cells,which are arranged in a wreath-like manner in one or more layers. In $C_4$ plants,there are two carboxylation reactions: the first occurs in the mesophyll chloroplasts and the second in the bundle sheath chloroplasts. $RuBisCO$ is present in the bundle sheath chloroplasts,where the $C_3$ cycle (Calvin cycle) takes place.

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Plants like sugarcane show high productivity and high efficiency of $CO_2$ fixation,because of

Which of the following chloroplasts does not contain grana?

$A-$ In $C_4$ plants,carboxylation takes place in the chloroplasts of mesophyll cells and bundle sheath cells.
$R -$ In $C_3$ plants,$CO_2$ fixation occurs in mesophyll cells and bundle sheath cells.

By looking at a plant externally,can you tell whether a plant is $C_{3}$ or $C_{4}$? Why and how?

In the first phase of the $C_4$ pathway:

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