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  4. Based on the Hatch and Slack pathway, which of the following compounds are found in mesophylls and bundle sheath cells, respectively?

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Q. Based on the Hatch and Slack pathway, which of the following compounds are found in mesophylls and bundle sheath cells, respectively?

NTA AbhyasNTA Abhyas 2020Photosynthesis in Higher Plants

Solution:

The primary CO2 acceptor is a 3-carbon molecule phosphoenolpyruvate (PEP) and is present in the mesophyll cells. The enzyme responsible for this fixation is PEP carboxylase or PEPcase. It is important to register that the mesophyll cells lack RuBisCO enzyme. The C4 acid OAA is formed in the mesophyll cells.