A) Four carbon acids are the primary initial \[C{{O}_{2}}\] fixation products
B) The primary fixation \[C{{O}_{2}}\] is mediated via PEP carboxylase
C) Effective pumping of \[C{{O}_{2}}\] into bundle sheath cells
D) Rubisco in \[{{C}_{4}}\] plants has higher affinity for \[C{{O}_{2}}\]
Correct Answer: C
Solution :
Atm. \[C{{O}_{2}}\] concentration is not limiting factor for \[{{C}_{4}}\] plants due to effective pumping or effective transfer of \[C{{O}_{2}}\] from mesophyll cells to bundle sheath cells where the final fixation of \[C{{O}_{2}}\] occurs and rate of photosynthesis is depends on rate of final \[C{{O}_{2}}\] fixation.
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