For Question 13, most of the information is extraneous. The big question is: if the products of the GALT activity enter into glycolysis, then where does glycolysis take place within the cell? We know that oxidative phosphorylation and the Krebs cycle occur in the mitochondria, but glycolysis occurs outside of this organelle, in the cytoplasm of the cell. This is where the enzyme GALT would be found.
For Question 15, these diagrams are a simple breakdown of the substrate-enzyme complex and what occurs as the enzyme catalyzes the reaction. The specific key term here is that the reaction is a hydrolysis reaction (in other words, one is which a molecule of water is used to break apart bonds holding two or ...
In these solutions, I adiscuss questions dealing with enzyme-substrate complex (pictorial), oxidative respiration in rat liver cells, and a question dealing with glycolysis.