stephanie_ramirez_di. Glycolysis is followed by the Krebs cycle during aerobic respiration. What is the starting molecule for glycolysis? • In eukaryotes, glycolysis takes place in the cytosol • Glycolysis is anaerobic; it does not require oxygen • In the presence of O2, pyruvate is further oxidized to CO2. Glycolytic intermediates and products are used to synthesize lipids, amino acids, and other important molecules in addition to be completely oxidized to generate ATP. 1. (iv) Enzymes are highly specific for reactions. When concentration of the reactants is higher than the equilibrium concentration then. In the fasted state in which glucose levels are low, hepatocytes switch to fatty acid β oxidation for energy . In glycolysis, a six-carbon sugar known as glucose is split into two molecules of a three-carbon sugar called pyruvate. Therefore these cells only get energy (2 ATP) from glycolysis and not from the TCA cycle. Other Quizlet sets. NADH & H+, NAD+. (i) During inhalation, ribs move inward and diaphragm is raised. Gluconeogenesis responds to which of the following? Which statement concerning glycolysis is FALSE? B) anabolic metabolism. If the statement is false, change the underlined word or words to make the statement true. Cellular. The oxidation of glucose begins during glycolysis. answer choices the Calvin Cycle the electron transport chain the Krebs Cycle back through the glycolysis process Question 3 E) oxidative phosphorylation. The glycolysis process converts one molecule of glucose into two molecules of pyruvic acid in the absences of oxygens. Glycolysis produces pyruvate from glucose. Glycolysis is the name given to a metabolic pathway occurring in many different cell types. C. more products will be formed. c. Four ATP Molecules are produced per oxidized glucose molecule. What is true about enzymes quizlet? Q. NADH & H+, NAD+. Key Terms. Question. Glycolysis also refers to other pathways, such as the Entner-Doudoroff pathway . answer choices 2 molecules of pyruvic acid 1 molecule of glucose NAD+ oxygen Question 2 30 seconds Q. Which of the following statements about glycolysis is true? A. the gibbs free energy will be positive. 30- c) Defect in glucose-6-phosphatase leads to abnormal accumulation of glycogen in liver. This drug would not be a good. D. both (b) and (c) Answer: D. 12. Glycolysis is an example of: A) aerobicmetabolism. 28- a) Glucose-6-phosphatase. A) it splits glucose to form two molecules of pyruvate B) it begins the oxidation of glucose C) it produces a small amount of ATP D) it generates NADH+H E) it oxidizes glucose to carbon dioxide 1. a. . In glycolysis, four ATP molecules made from each unit of glucose, however, two ATP molecules are used during this process, so the net result of one round of glycolysis is two ATP molecules. True or False: The Kreb's cycle is the same thing as the citric acid cycle. Term. 86 terms. an organism which . Most of the free energy available from the oxidation of glucose remains in pyruvate, one of the products of glycolysis. Which of the following statements is/are true regarding anaerobic glycolysis? D) fermentation. dasia_malea. The by-products of glycolysis provide enough building blocks for cancer cells to . It uses glucose-6-P as a substrate when producing NADPH and CO 2. 30 seconds . e. Glycolysis converts one molecule of glucose to two molecules of pyruvate. Thus, option e. is not true. The pyruvate produced from glucose can generate more energy. The ATPs produced directly by glycolysis and the citric acid cycle are produced using ____. glyceraldehyde 3-phosphate dehydrogenase. Glucose-6-phosphate dehydrogenase is the control enzyme and it is regulated by the NADPH concentration of the cell. Phosphofructokinase is an allosteric enzyme that catalyzes the conversion of fructose 6- phosphate to fructose 1,6-bisphosphate, an early step of glycolysis. In the absence of O2, pyruvate can be fermented to lactate or ethanol. d. The reaction catalyzed by hexokinase is the rate-determining step. Quiz Questions. Depending on the microcellular environment (specifically, oxygen availability, energy demand, and the presence or absence of mitochondria), pyruvate has several separate fates: D) Oxidation of a substrate results in a high energy bond. Glucose is trapped by phosphorylation, with the help of the enzyme hexokinase. (-1) no answer (1) All allosteric proteins are oligomeric (2) All proteins that show cooperative binding . Synthesizing protein and glucose. a. Glycolysis requires the input of 2 ATP. 88 terms. Glycolysis is the process in which one glucose molecule is broken down to form two molecules of pyruvic acid (also called pyruvate). AOTA 5. NAD + has more chemical energy than NADH. B. It is a ancient form of respiration in cells before Krebs cycle. True: Term. View Biology Unit 1 practice 7.docx from SCI 207 at Ashford Academy. In glycolysis, a six-carbon glucose molecule is broken down to two molecules of three-carbon pyruvate. In the absence of oxygen, the cells make small amounts of ATP as glycolysis is followed by fermentation. It results in a net gain of four ATP molecules. In glycolysis, glucose is converted into two molecules of _____. Questions: Top. B. the gibbs free energy will be negative. This conversion does not require oxygen and in the process there is net gain of 2ATP. Glycolysis is the primary step of cellular respiration, which occurs in all organisms. E) ATP is synthesized from adenosine plus 3 phosphates. The glycolysis process is a multi-step metabolic pathway that occurs in the cytoplasm of animal cells, plant cells, and the cells of microorganisms. Glycolysis occurs in the cytoplasm of virtually all cells. A. True. C) a net reductive process. Glycolysis. Which of the following enzymes catalyzes a reaction that is normally reversible in the cell? Term. The rate of glycolysis increases in response to low concentrations of ADP E. None of the above; Question: Which of the following statements is true? A) Electrons are passed through a series of carriers to O2. answer choices citric acid oxaloacetic acid pyruvic acid Acetyl CoA Question 12 Where does the pyruvic acid produced by glycolysis go next? The formation of lactate and 2 ATP is the net yield 2. 1. D. two phosphate groups are involved. In the absence of NAD +, glycolysis can still function. phosphofructokinase-1. 1. 6. Which of the following is not true of glycolysis? Which of the following is correct about enzymes? This process uses NADH and FADH2 to produce ATP oxidative phosphorylation fermentation glycolysis krebs cycle. The anaerobic glycolysis is slower than the aerobic glycolysis 4. When glucose is broken down so as to create energy that process is called glycolysis and it takes place with presence or absence of oxygen. Glycolysis 2. The pyruvate made in red blood cells is converted to lactate by the . A. Hormonal control B. pH control C. Temperature control D. Blood control Answer: A Gluconeogenesis 4.Glycogenesis 5. Which is a product of glycolysis? - In glycolysis ATP is used to split glucose molecules into 2 three-carbon compounds called pyruvate . GLYCOLYSIS MCQs GLYCOLYSIS Objective Type Questions with Answers 11. SURVEY . Contains chains of glucosyl units linked by alpha-1,4 bonds with alpha-1,6 branches. True or false: Glycolysis does not require oxygen. NAD + is reduced to NADH during glycolysis, pyruvate oxidation, and the citric acid cycle. Q. Glycolysis results in a net gain of how many ATP? D. 3-carbon molecule to a 4-carbon molecule. True. answer choices . C) a net reductive process. NAD+ & Pi, NADH & H+. 3. Most of the ATP produced from the breakdown of glucose comes from. Glycolysis is the pathway that converts sugar into energy, or glucose (C6H12O6) into pyruvate (CH3COCOO), generating ATP during the conversion. 4. 250+ TOP MCQs on Coordinated Regulation of Glycolysis and Gluconeogenesis and Answers Biochemistry Multiple Choice Questions on "Coordinated Regulation of Glycolysis and Gluconeogenesis". In this phase, the starting molecule of glucose gets rearranged, and two phosphate groups are . Questions: 30 | Attempts: 865 | Last updated: Mar 22, 2022. The process of changing fatty acids to several. phosphofructokinase-1. Below is a glycolysis trivia: test your knowledge! D) Glycolysis is also called the Embden-Meyerhof pathway. When these differences along with the true charges on the two phosphate groups are considered together, the net charges of −4 on each side are balanced. Adenosine triphosphate (ATP) is used in this reaction and the product, glucose-6-P, inhibits hexokinase. Correct! C) a net reductive process. Oxygen is not required. AP BIO TEST 2. Glycolysis functions with (aerobic conditions) or without (anaerobic conditions) oxygen present. B) anabolic metabolism. Explanation: Glycolysis is the first step of respiration and also the process for fermentation. False. A. Glycolysis occurs in the intermembrane space of the mitochondria B. Molecules of NAD+ acquire electrons during glycolysis C. ATP, FADH2, and O2 are produced during glycolysis D. Tags: Question 14 . Question 1 1 / 1 pts Which of the following statements about NAD + is true? Enzymes that catalyze redox reactions with the help of coenzymes such as NAD+ are called dehydrogenases. A biochemist has synthesized a drug that blocks phosphofructokinase. In the matrix, pyruvic acid is converted to lactic acid before the Krebs cycle Glycolysis is an example of: A) aerobic metabolism. (ii) Enzymes are proteins whose three dimensional energy. ACETIC 5. It consists of 11 enzymatic steps that convert glucose to lactic acid. B. A) All cells perform glycolysis. aldolase. The enzyme that catalyzes this reaction is phosphoglycerate mutase Which enzyme is responsible for the conversion of glucose-6-phosphate into fructose-6-phosphate? an organism that can neutralize the pH of the environment it is in. (iii) Enzymes speed up reactions by lowering activation energy. phosphoglucoisomerase Consider phosphofructokinase, what statement is true? 4. It consists of 11 enzymatic steps that convert glucose to lactic acid. Answers: the process by which plants use carbon dioxide and water to make sugar and oxygen. hexokinase. Which of the following statements about respiration is true? 2. Which of the following is not true of glycolysis? False. ATP contains a 5-carbon sugar, three phosphate groups, and an adenine base. glycolysis occurs in the mitochondria glycolysis is the first step in both aerobic and anaerobic respiration glycolysis produces 2 ATP, 2 NADH, and 2 pyruvate. The complete breakdown of fatty acids and glycerol to carbon dioxide and water gives more ATP per molecule than does the breakdown of glucose. Which of the following statements about glycolysis is true? Cellular respiration is _____. It has a net production of 2 ATPs and 2 NADH. A) ATP B) NADH and ATP C) NADH D) NADH, ATP, and pyretic acid Glycolysis, which translates to "splitting sugars", is the process of releasing energy within sugars. Glycolysis is the name given to a metabolic pathway occurring in many different cell types. Glycolysis takes place in virtually all living cells, including all animal cells, all plant cells, and almost all bacterial cells. Place the basic steps in glycolysis in order. An enzyme not involved in the control of glycolysis is (-1) no answer (1) hexokinase (2) triose phosphate isomerase (3) pyruvate kinase (4) phosphofructokinase -1: 0: 1: 1 : 2: 40 : 3: 15 : 4: 0: Which of the following statements is true? C)The energy released in the reduction of carrier molecules is used to generate ATP. not dependent on photosynthesis . Energy-requiring phase. The phosphorylation of fructose 6-phosphate to fructose-1,6-bisphosphate is the committed step in glycolysis because A. it is the rate-limiting step. BMB 401 Exam 3 Lecture 2. Example of such cell are red blood cells. 0. (iii) Haemoglobin has greater affinity for carbon dioxide than oxygen. A total of 2 NADH are produced. What is the function of NAD quizlet? 2-carbon molecule to a 4-carbon molecule. 151.1) Anaerobic glycolysis is the main metabolic pathway used in the setting of limited oxygen supply during exercise. These products are made via substrate-level phosphorylation, a process in which a phosphorylated molecule transfers its phosphate to ADP or GDP (producing ATP or GTP). NAD acts as an electron and hydrogen carriers in some oxidation-reduction reactions. Reactants- Pyruvate + NADH Products- Lactate + NAD+. aldolase. In general terms, explain the role of the electron transport chain in cellular respiration. 2. Explanation: . Glycolysis is oxygen dependent. Now in aerobic glycolysis, Oxidation happens when pyruvate goes to the citric acid cycle. answer choices it is the first stage of cellular respiration it occurs in the cytoplasm it only occurs if oxygen is present means the breakdown of sugar Question 2 30 seconds Q. ATP contains a 6-carbon sugar, two phosphate groups, and an adenine base. c. Glycolysis does not require oxygen d. Oxidative phosphorylation occurs during glycolysis. B) Glycolysis produces glucose. The reaction produces a lot of free energy which is released as heat later. molecules of acetyl CoA is called: Through this process, the 'high energy' intermediate molecules of ATP and NADH are synthesised. C) An exergonic reaction is used to drive the synthesis of ATP from ADP plus phosphate. Which of the following is not an end product of the Kreb's cycle? For Questions 4-7, write True if the statement is true. Electron carriers are important molecules in biological systems. C. 2-carbon molecule to a 6-carbon molecule. 2-carbon molecule to a 4-carbon molecule. E) oxidative phosphorylation. to produce ______ molecules. Substrate level phosphorylation: Term. Q. This suggests that glycolysis is an evolutionary ancient pathway. Glycolysis takes place in the cytosol of a cell, and it can be broken down into two main phases: the energy-requiring phase, above the dotted line in the image below, and the energy-releasing phase, below the dotted line. Glycolysis is the name given to a metabolic pathway occurring in many different cell types. The control enzyme is phosphofructokinase-1 which converts fructose-6-phosphate to fructose-1,6-bisphosphate; The pathway is activated allosterically by fructose-2,6-bisphosphate and AMP; The pathway is in the cytosol of every cell The pathway produces lactate and NAD + 31-c) It involves transport of lactate from skeletal muscle to liver for gluconeogenesis. NAD+ accepts the electrons during the oxidation, and as a result it gets reduced. LACTATE FERMENTATION: occurs in muscle, erythrocytes, and some other cells. . D. 3-carbon molecule to a 4-carbon molecule. It breaks glucose If you need to refresh your memory. Energy is released when the bond between the adenine base and the sugar is broken. The following glycolytic enzyme is regulated by phosphorylation: hexokinase. The glycolysis process truly does not require oxygen to proceed. Glycolysis is a sequence of reactions that metabolizes one molecule of glucose to two molecules of pyruvate with the concomitant net production of two ATP and NADH molecules. Glycogen/glucose metabolism ( Fig. b. (i) Enzymes do not alter the overall change in free energy for a reaction. D) fermentation. 1 and2 : All of the following are true of glycolysis except: occurs without oxygen ends with the formation of pyruvate (pyruvic acid) occurs during fermentation breaks down glucose to carbon dioxide and water which of the following describes a neutrophile? An end product of glycolysis is 2 molecules of NADH. (ii) In the alveoli, exchange of gases takes place i.e., oxygen from alveolar air diffuses into blood and carbon dioxide from blood into alveolar air. answer choices True False Question 11 20 seconds Q. NAD+ & Pi, NADH & H+. D) fermentation. Glycolysis is the process by which one molecule of glucose is converted into two molecules of pyruvate, two hydrogen ions and two molecules of water. C) Glycolysis is the main source of NADH in the cell. There is a net of 2 NADH produced in the process 3. Glycolysis is the first pathway in cellular respiration. Aerobic glycolysis is a series of reactions wherein oxygen is required to reoxidize NADH to NAD+, hence the name. It consists of 11 enzymatic steps that convert glucose to lactic acid. answer choices . What is the role of NADH quizlet? answer choices Glucose ADP Oxygen Pyruvic Acid Question 10 20 seconds Q. Glycolysis requires answer choices ATP Oxygen sunlight NADP+ Question 11 30 seconds Q. Which of the following terms means the chemical addition of a phosphoryl group (PO 3-) to an organic molecule. Kreb's cycle 3. True. The reaction catalyzed by hexokinase is the rate-determining step. The pyruvic acid produced in glycolysis enters the chloroplasts if oxygen is present in a cell. B) anabolic metabolism. Warburg Effect and Mitochondria. 29-d) Acetyl CoA is an activator of enzyme pyruvate carboxylase. In fact, glycolysis likely evolved more than 3 billion years ago. E) oxidative phosphorylation. A) An enzyme passes a high-energy phosphate to ADP resulting in ATP. In the final step of glycolysis ATP is made through the process of: answer choices Substrate Level Phosphorylation Oxidative Phosphorylation Photo-Phosphorylation RedOx Reactions Question 12 20 seconds Q. Through the process of glycolysis, one molecule of glucose breaks down to form two molecules of pyruvate. The initial reaction of the Krebs cycle involves the addition of a. In cellular respiration, most ATP molecules are produced by ___. An important term to know is catabolism. A branched polymer made from glucose with a variable molecular weight between 10 and 100 million. The initial reaction of the Krebs cycle involves the addition of a. True or False False What are the major pathways of carbohydrate metabolism? Glycolysis is a cytoplasmic pathway which breaks down glucose into two three-carbon compounds and generates energy. 11. MITOCHONDRIA 4. A. Energy is released when a single phosphate group is added to the existing two phosphate groups. Xmbby. The NAD+ regenerated is used in the glycolysis process to make ATP. 2-carbon molecule to a 5-carbon molecule. The following glycolytic enzyme is regulated by phosphorylation: hexokinase. All of the following statements about the pentose phosphate pathway are true EXCEPT. Wow, it's even older than me! Along with ATPs, in the process of glycolysis, 2 electron carrying molecules NADH are produced from NAD⁺. It is used during high-intensity, sustained, isometric muscle activity.1 It is inefficient from an energetic standpoint and produces only two ATP molecules per glucose molecule, which is 19 . Which of the following enzymes catalyzes a reaction that is normally reversible in the cell? GLYCOLYSIS Objective Type Questions with Answers. B) It does not involve organelles or specialized structures, does not require oxygen, and is present in most organisms. C. 2-carbon molecule to a 6-carbon molecule. A _____ chemical reaction occurs when a large molecule is broken down into . B)The energy released as carrier molecules are oxidized is used to generate ATP. When concentration of the reactants is higher than the equilibrium concentration then A. the gibbs free energy will be positive B. the gibbs free energy will be negative C. more products will be formed D. both (b) and (c) Answer: D 12. Whereas, when in anaerobic glycolysis, lactate dehydrogenase converts pyruvate to lactate. Question 29 29. Q. Glycolysis occurs during aerobic or anaerobic conditions. Glycolysis is a (n) oxidative process that breaks down glucose and is therefore catabolic b. 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