Chapter 14 Glycolysis, Gluconeogenesis, and the Pentose
Chapter 14 Glycolysis, Gluconeogenesis, and the Pentose
Chapter 14 Glycolysis, Gluconeogenesis, and the Pentose
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
170<strong>Chapter</strong> <strong>14</strong> <strong>Glycolysis</strong>, <strong>Gluconeogenesis</strong>, <strong>and</strong> <strong>the</strong> <strong>Pentose</strong> Phosphate Pathway53. Feeder pathways for glycolysisPage: 524 Difficulty: 3Yeast can metabolize D-mannose to ethanol <strong>and</strong> CO 2 . In addition to <strong>the</strong> glycolytic enzymes, <strong>the</strong> onlyo<strong>the</strong>r enzyme needed is phosphomannose isomerase, which converts mannose 6-phosphate to fructose6-phosphate. If mannose is converted to ethanol <strong>and</strong> CO 2 by <strong>the</strong> most direct pathway, which of <strong>the</strong>compounds <strong>and</strong> cofactors in this list are involved?Ans: B, G, I, JA. LactateB. AcetaldehydeC. Acetyl-CoAD. FADE. Glucose 6-phosphateF. Fructose 1-phosphateG. PyruvateH. Lipoic acidI. Thiamine pyrophosphateJ. Dihydroxyacetone phosphate54. The pentose phosphate pathway of glucose oxidationPage: 524 Difficulty: 2Rat liver is able to metabolize glucose by both <strong>the</strong> glycolytic <strong>and</strong> <strong>the</strong> pentose phosphate pathways.Indicate in <strong>the</strong> blanks if <strong>the</strong> following are properties of glycolytic (G), pentose phosphate (P), both (G+ P), or nei<strong>the</strong>r (0):_____ NAD+ is involved._____ CO 2 is liberated._____ Phosphate esters are intermediates._____ Glyceraldehyde 3-phosphate is an intermediate._____ Fructose 6-phosphate is an intermediate.Ans: G; P; G + P; G; G55. <strong>Glycolysis</strong>Page: 526 Difficulty: 2In <strong>the</strong> conversion of glucose to pyruvate via glycolysis, all of <strong>the</strong> following enzymes participate.Indicate <strong>the</strong> order in which <strong>the</strong>y function by numbering <strong>the</strong>m.1 hexokinase_4__ triose phosphate isomerase_2__ phosphohexose isomerase_6__ enolase_5__ glyceraldehyde 3-phosphate dehydrogenase_7__ pyruvate kinase_3__ phosphofructokinase-1Which of <strong>the</strong> enzymes represents a major regulation point in glycolysis?Which catalyzes a reaction in which ATP is produced?Which catalyzes a reaction in which NADH is produced?