Glycolysis and Cellular Respiration, Exams of Nursing

Download Glycolysis and Cellular Respiration and more Exams Nursing in PDF only on Docsity! Question 1 3 / 3 pts True or False: The ΔG value for a particular reaction is -78kJ/mol. This value indicates the reaction is NOT spontaneous. FALSE Question 2 3 / 3 pts True or false: A biochemical metabolic pathway is a single reaction that converts starting material into products. FALSE Question 3 3 / 3 pts True or false: Three ATP molecules are used in the energy-investing stage of glycolysis. FALSE Question 4 3 / 3 pts True or False: The citric acid cycle occurs in the absence of oxygen. FALSE Question 5 0 / 3 pts True or false: The β-oxidation pathway degrades both even-numbered and odd- numbered fatty acids. TRUE Question 6 3 / 3 pts BioChem 210 Module 7 Exam - Portage Learning In converting glucose to pyruvate, how many ATP or NADH are produced (or required) in the 1,3-bisphosphoglycerate to 3-phosphoglycerate step in glycolysis? 2 ATP produced 1 ATP required 1 NADH produced 2 NADH and 1 ATP produced None of the above 2 ATP PRODUCED Question 7 3 / 3 pts In converting glucose to pyruvate, how many ATP or NADH are produced (or required) in the phosphoenolpyruvate to pyruvate step in glycolysis? 1 ATP required 1 ATP produced 2 ATP produced 2 ATP required None of the above 2 ATP PRODUCED Question 8 3 / 3 pts What is the primary reactant of glycolysis? Correct! Glucose Glucose-6-phosphate Fructose Fructose-6-phosphate Hexokinase Isomerization reaction Phosphorylation reaction Protein production Lipid phosphorylation None of the above PHOSPHORYLATION REACTION Question 15 3 / 3 pts Which of the following is a cyclic pathway? A. CAC B. PDH C. Glycolysis D. Oxidative phosphorylation E. β-oxidation A.CAC Question 16 3 / 3 pts How many ATP molecules does NADH yield after oxidative phosphorylation? 1.5 2 2.5 3 3.5 2.5 Question 17 3 / 3 pts Besides NADH and FADH2, what energy molecule is produced directly in the citric acid cycle? ATP GTP CTP TTP None of the above GTP What molecule is missing in the following reaction? A. Fumarate B. Malate C. Succinate D. CO2 E. Succinyl-CoA C.SUCCINATE Question 19 3 / 3 pts Pyruvate conversion to acetyl-CoA production occurs in the ________. Lysosomes Vacuoles Nucleus Mitochondria None of the above MITOCHONDRIA Question 20 3 / 3 pts Cellular respiration is the process of cells taking in ______ and producing ______ to generate energy. A. Glucose; NADH B. FAD; FADH2 C. CO2; ATP Question 25 3 / 3 pts The sequential process for oxidizing fatty acids to acetyl-CoA is often called: A. β-degradation B. α-degradation C. Spiral D. α-spiral E. β-spiral E. β-spiral Question 26 5 / 5 pts (Short answer) In one step of the glycolysis pathway, a six-carbon compound is broken into two three-carbon fragments, only one of which can be further degraded in the glycolysis pathway. What happens to the other three-carbon fragment? In step 5 of glycolysis, glucose (six-carbon) is converted to GAP and DHAP (both 3-carbons). GAP goes on in the glycolysis pathway. The other, DHAP, cannot go on through glycolysis directly; it is converted to GAP by triose phosphate isomerase. Question 27 5 / 5 p (Fill in the blank) Use the following word bank to fill in the appropriate blanks. Not all words will be used; words can be used more than once. Word bank: one, two, three, four, five, six Glucose contains ___(A)_____ carbon atoms. The oxidation of a glucose molecule utilizes ______(B)______ ATP. Later, the ____(C)_____ three-carbon products of glycolysis produce ____(D)______ ATP by direct phosphorylation, which gives a net yield of two ATP. In addition, ____(E)_____ NADH are produced in glycolysis. A) six B) two C) two D)four E) two Question 28 5 / 5 pts (Short response) Consider the fatty acid which has 20 carbons (below). A. (2 pts) How many cycles of β-oxidation are required for catabolism? Briefly explain. B. (2 pts) How many acetyl-CoA are produced during catabolism? Briefly explain. C. (1 pts) How many NADH and FADH2 are produced from β-oxidation (only) of this molecule? A. 9 cycles are required for oleic acid. Each cycle removes two carbon units. ON the final cycle, two acetyl groups are produced. B. There are 10 acetyl-CoA groups produced. Two acetyl-CoA groups on the last cycle. C.There are 9 NADH and 9 FADH2 molecules produced. One per cycle Question 29 0 / 10 pts Short Essay: (10 points each) The complete oxidative catabolism of glucose to form CO2 and H2O occurs in three phases. Describe each of the three phases giving the important pathway in each phase and the energy molecules produced in each. Answer: First phase: Glucose metabolism begins with glycolysis which degrades the molecule into two molecules of pyruvate and also produces 2 ATP and 2 NADH molecules. The pyruvate is converted to acetyl-CoA. Second Phase: the acetyl-CoA groups are shuttled through the citric acid cycle to generate GTP, NADH, FADH2 molecules along with the release of CO2. Third Phase: the NADH and FADH2 coenzymes are themselves oxidized in the mitochondria to yield ATP by a process called oxidative phosphorylation.