Phosphofructokinase is a catalytic enzyme that plays a crucial role in controlling biochemical process. It plays an important role during glycolysis, in converting fructose-6-phosphate into fructose 1,6-biphosphate. It also converts ATP (adenosine triphosphate) into ADP (adenosine diphosphate) molecules. These steps help in controlling the glycolytic pathway.

Question

Which of the following statements is a lie? Select one: a.The formation of water aids in establishing the ion gradient between the inner matrix and intermembrane space. b.Every protein complex in the electron transport chain is involved in the direct pumping of H+ in the intermembrane space. c.There is an existing electrochemical gradient between the intermembrane space and the inner mitochondrial matrix.

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Question

Chapter 7, Problem 7TYK

Summary Introduction

Introduction:

Phosphofructokinase is a catalytic enzyme that plays a crucial role in controlling biochemical process. It plays an important role during glycolysis, in converting fructose-6-phosphate into fructose 1,6-biphosphate. It also converts ATP (adenosine triphosphate) into ADP (adenosine diphosphate) molecules. These steps help in controlling the glycolytic pathway.

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Which of the following statements is a lie? Select one: a.The formation of water aids in establishing the ion gradient between the inner matrix and intermembrane space. b.Every protein complex in the electron transport chain is involved in the direct pumping of H+ in the intermembrane space. c.There is an existing electrochemical gradient between the intermembrane space and the inner mitochondrial matrix.

Which of the following statements is true? A. The NADH dehydrogenase complex can pump more protons than can the cytochrome b-c1 complex. B. The pH in the mitochondrial matrix is higher than the pH in the intermembrane space. C. The proton concentration gradient and the membrane potential across the inner mitochondrial membrane tend to work against each other in driving protons from the intermembrane space into the matrix. D. The difference in proton concentration across the inner mitochondrial membrane has a much larger effect than the membrane potential on the total proton-motive force.

Which of the following statements is NOT true about the electron transport chain (ETC) and oxidative phosphorylation? A. Oxidative phosphorylation requires the enzyme complexes to be soluble in the mitochondrial matrix. B. If the proton gradient is too high, electrons will not move through the ETC. C. The movement of electrons down the ETC only happens if protons are pumped out of the mitochondrial matrix. D. Oxidative phosphorylation requires the mitochondrial intermembrane space to be more positively charged than the matrix. E. The free energy of the proton gradient can be used to create high energy bonds.