Biology 111- Chapter 9 Test Bank 54 Correctly Answered Questions Latest Update

High levels of citric acid inhibit the enzyme phosphofructokinase, a key enzyme in glycolysis. Citric acid binds to the enzyme at a different location from the active site. This is an example of _____. {Ans: allosteric regulation}Carbohydrates and fats are considered high-energy foods because they _____. {Ans: have a lot of electrons associated with hydrogen.}Carbon dioxide (CO2) is released during which of the following stages of cellular respiration? {Ans: oxidation of pyruvate to acetyl CoA and the citric acid cycle}The synthesis of ATP by oxidative phosphorylation, using the energy released by movement of protons across the membrane down their electrochemical gradient, is an example of _____. {Ans: an endergonic reaction coupled to an exergonic reaction}The molecule that functions as the reducing agent (electron donor) in a redox or oxidation-reduction reaction _____. {Ans: loses electrons and loses potential energy}In liver cells, the inner mitochondrial membranes are about five times the area of the outer mitochondrial membranes. What purpose must this serve? {Ans: It increases the surface for oxidative phosphorylation.}