Exam 1: Mesophyll Rxns Flashcards
1
Q
how many rxns are there
A
3
2
Q
1st rxn
A
CO2 + H2O —> HCO3- + H+
catalyzed by carbonic anhydrase
3
Q
2nd rxn
A
HCO3- + PEP –> oxaloacetate + Pi
catalyzed by PEP carboxylase
4
Q
mechanism of PEP carboxylase
A
uses Pi hydrolysis from PEP to drive the rxn (instead of ATP hydrolysis)
5
Q
3rd rxn
A
Oxaloacetate + NADPH + H+ –> malate + NADP+
catalyzed by malate dehydrogenase
goes in reverse direction than citric acid cycle (uses NADPH instead of NADH)
6
Q
what happens to the malate formed in the ___ rxn?
A
3rd
transported to the bundle sheath cell through a pore called a plasmodermata
