The net requirement of assimilatory power for the formation of $6$ hexose molecules in a maize plant is:

Which of the following enzymes is responsible for the conversion of oxaloacetic acid into malic acid?

Which is the first stable product of the $C_4$ pathway?

Given below are two statements:
Statement $I$: The primary $CO_{2}$ acceptor in $C_{4}$ plants is phosphoenolpyruvate $(PEP)$ and is found in the mesophyll cells.
Statement $II$: Mesophyll cells of $C_{4}$ plants lack $RuBisCo$ enzyme.
In the light of the above statements,choose the correct answer from the options given below:

Phosphoenol pyruvate $(PEP)$ is the primary $CO_2$ acceptor in

The stomata in $CAM$ plants open during