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  4. The common molecule between the Kreb cycle and C4 pathway is

Q. The common molecule between the Kreb cycle and C4 pathway is

 1870  209 NTA AbhyasNTA Abhyas 2020Photosynthesis in Higher Plants Report Error

Solution:

The primary acceptor of CO2 in C4 plants is phosphoenolpyruvate or PEP. PEP in mesophyll cells combine with CO2 and converted into 4 carbon compound oxaloacetic acid by PEP carboxylase. In C3 plant ribulose1,5-diphosphate is the primary acceptor of CO2.​
In the Kreb cycle, oxaloacetic acid combines with acetyl Co-A to form the first stable product called citric acid.