In C3 plants , the enzyme that incorporates CO2 into an organic molecule is Naim 09:03 AP Biology In C3 plants , the enzyme that incorporates CO2 into an organic molecule is A. helicase B. PEP carboxylase C. RuBP carboxylase D. carboxypeptidase E. pyruvate decarboxylase Answer: C. RuBP carboxylase Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+