Question

why does RuBisco carry out preferentially carboxylation than oxygenation in C4 plants

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Answer 1

Answer:

C4 plants use this 4-carbon compound to effectively “concentrate” CO2 around rubisco, so that rubisco is less likely re react with O2. ... This enzyme is called phosphoenolpyruvate (PEP) carboxylase, and it has no oxygenase activity and has a much higher affinity for CO2 than rubisco.

Answer 2

C4 plants

Explanation:

1. C4 plants utilize this 4-carbon compound to viably "concentrate" CO2 around rubisco, so rubisco is more uncertain re respond with O2. It is called phosphoenolpyruvate (PEP) carboxylase,
2. In C 3 plants  photorespiration has the impact of decreasing the pace of photosynthesis, as air oxygen can join with rubisco.
3. In C 4 plants  the impact of photorespiration is irrelevant as the liking of phosphoenolpyruvate carboxylase for carbon dioxide is amazingly high.  
4. Instances of C4 species are the financially significant harvests corn or maize (Zea mays), sugarcane (Saccharum officinarum), (Sorghum bicolor), and millets, just as the switchgrass (Panicum virganum) which has been used as a wellspring of biofuel.