Which one of the following statements is incorrect about Glycolysis Phase A? Alright. So phosphorylation reactions 1 and 3 are catalyzed by kinases. This is true. Kinases are the enzymes that we use for transferring a phosphate group from ATP to our specified molecule.
Bond cleavage in reaction 4 produces ATP. No. Remember, phase A deals with the consumption of energy, not the production of energy. And then here, if we're talking about bond cleavage, we're really talking about hydrolysis. Hydrolysis is what can lead to the production of energy. But that's not what's happening here. So this is incorrect.
Monocleben in reaction 4 produces 2 Triose Phosphates. This is true. We create Dihydroxyacetone Phosphate and Glyceraldehyde 3 Phosphate, which can isomerize between each other.
Isomerization of DHAP, which is our Dihydroxyacetone Phosphate, and G3P, which is our Glyceraldehyde 3 Phosphate, is catalyzed by Triose Phosphate Isomerase. Now, here, this is an isomerization reaction, so the enzyme of choice would have to be an isomerase. This is a true statement. So out of our choices, the only one that is incorrect would have to be option B.