A) guard cells
B) bundle sheath
C) spongy mesophyll
D) palisade cells
Correct Answer: B
Solution :
\[{{\text{C}}_{\text{4}}}\]-pathway occurs in some tropical plants having Kranz Anatomy (connective undifferentiated mesophyll around vascular bundler with chloroplast containing bundle sheath). Bundle sheath chloroplasts are larger, agranal and without PS-II activity. Therefore, light dependent reactions occur at very low rate, so little reduced NADP, ATP or \[{{O}_{2}}\]generated. In bundle sheath cells, high concentration of RuBP carboxylase is present so, \[C{{O}_{2}}\] fixation occurs as in \[{{C}_{3}}\]plants but more efficiently. In mesophyll cells, \[C{{O}_{2}}\]fixation does not take place due to lack of RuBP carboxylase.
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