Here in this example question it says, reactions 1 and 2 consume blank and blank and are catalyzed by which enzymes. Alright. So remember memory tool 4. We're gonna say here that for reaction 1, it's ATP because remember, we're gonna say here all the pirates. So ATP. That means the answer is gonna be either a or b. Reaction 2 is GTP. All the pirates go to party. So GTP. So it's still either a or b.
Now, in reaction 1, we have oxaloacetate formation. Remember, that's us going from pyruvate to oxaloacetate. In order to do this, we need to add a carbon dioxide to pyruvate, and we'd say that if we're bringing in a carbon dioxide, that's going to require a carboxylase. So here pyruvate carboxylase. And then for reaction 2, we have a decarboxylation as well as a phosphorylation. Here we're going to have to lose a carbon dioxide from oxaloacetate and bring in an inorganic phosphate. Since we are basically transferring an inorganic phosphate from GTP to create our new structure which is PEP, we'd have to use a kinase enzyme. And here it would be a carboxykinase because we have CO2 being removed to usher in the inorganic phosphate group. So here, the answer would be b. Here, it would be pyruvate carboxylase and then basically, phosphoenolpyruvate (PEP) would be catalyzed by carboxykinase. So here, our answer would have to be option b.