Introductory Biochemistry

:ĂŶƵĂƌǇ Ϯϱ ϮϬϭϲ ϳϯϴ WD

BIOCH | 200 | Introductory Biochemistry | lecture notes | :ĂŶƵĂƌǇ Ϯϱ ϮϬϭϲ ϳϯϴ WD

Special codes 111, 221 and 441 (1)D A D A D D B D D A (11)B D A D D B C B A E (21)D B C A D E B C D E (31)C A B A A A E E E A Special codes 112, 222 and 442 (1)B E E A B D D A B D (11)A D D A D A D D D C (21)B A E A E B C D E C (31)A D B C A D E B A A Special codes 113, 223 and 443 (1)D A D D B D A E D D (11)A B D A D D B E A D (21)B C A D E A B A A C (31)A B C D E C A B E E

Answer_Key_MTI_Winter_2013.docx-Special codes 111, 221 and 441

Enzymes_MCQ_Answers_Winter_2015.doc-Answers to Practice Exam Questions: Enzymes

Protein_Function_MCQ_Winter_2015.doc-Practice Exam Questions: Protein Function 1.

Answers to Practice Exam Questions: Glycolysis (Hint: see textbook pages 306-307 for a summary of the reactions in glycolysis.) 1. Which of the following phosphorylated compounds would you predict to be a "low-energy" intermediate in metabolism, relative to the others? A. ATP B. 1,3-bisphosphoglycerate C. Glucose 6-phosphate D. Phosphoenolpyruvate E. NADH 2. Which pair below correctly matches an enzyme with its effector? A. Phosphofructokinase-1 / fructose-1,6-bisphosphate B. Pyruvate kinase / phosphoenolpyruvate C. Hexokinase / glucose 1-phosphate D. Pyruvate kinase / fructose-1,6-bisphosphate E. Hexokinase / fructose-1,6-bisphosphate 3. Which of the following does NOT occur in the reactions of glycolysis between fructose-1,6- bisphosphate and 1,3-bisphosphoglycerate? A. Phosphoryl transfer B. An isomerization C. The formation of a high-energy intermediate D. Oxidation E. All of these occur. 4. In the oxidation reaction of glycolysis, which of the following statements is TRUE? A. It is an irreversible reaction. B. It is a regulated step of glycolysis. C. During the catabolism of glucose to pyruvate, NAD + is oxidized. D. Some of the energy from the oxidation reaction is captured by the formation of ATP. E. The reaction halts in the absence of inorganic phosphate. 1 5. Which of the following combinations correctly identifies net production when 1 mol of fructose 6-phosphate is converted to pyruvate during glycolysis? A. 1 mol of NAD + and 3 mol of ATP B. 2 mol of NAD + and 3 mol of ATP C. 1 mol of NADH and 2 mol of ATP D. 2 mol of NADH and 2 mol of ATP E. 2 mol of NADH and 3 mol of ATP 6. Each of the following compounds is capable of undergoing hydrolysis of a phosphate group. Which hydrolysis will yield the smallest free energy change? A. 1,3-bisphosphoglycerate B. Glucose 6-phosphate C. ADP D. Phosphoenolpyruvate E. ATP 7. The reactions in glycolysis catalyzed by phosphofructokinase-1 and pyruvate kinase are similar in that: A. They both use ATP. B. They are both catalyzed by allosteric enzymes. C. They are both reversible. D. They are both substrate-level phosphorylation reactions. E. They both involve three-carbon compounds. 8. Which of the following does NOT occur in the steps of glycolysis between 1,3-bisphosphoglycerate and phosphoenolpyruvate? A. ATP synthesis B. An isomerization C. The formation of a high-energy intermediate D. Phosphoryl transfer E. Oxidation 9. Phosphoenolpyruvate is an inhibitor of hexokinase activity. A. True B. False 2

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