Q. Which pair is wrong

 2125  171 AIPMTAIPMT 2001Photosynthesis in Higher Plants Report Error

Solution:

C4 pathway was first reported in members of family Gramineae (grasses) like sugarcane, maize, sorghum, etc. These C4 plants have a characteristic leaf anatomy called Kranz anatomy. So in chloroplasts of mesophyll cells - PEPCo (PEP carboxylase) is the key enzyme used to fix CO2 , in C4 plants.