In glycolysis, for each molecule of glucose oxidized to pyruvate Select one: A. two molecules of ATP are used and four molecules of ATP are produced. B.four molecules of ATP are used and two molecules of ATP are produced. Which of the statements below is the best explanation of why These, in addition to the 2 ATP made from glycolysis, gives a total of 6–8 molecules of ATP per glucose molecule. Substrate-level phosphorylation accounts for approximately what sources for energy? how many ATP molecules can the cell synthesize for each molecule of A) His mitochondria lack the transport protein that moves pyruvate found only in eukaryotic cells. role in glycolysis, one implication of the genetic defect resulting in dioxide exhaled by animals is generated by the reactions of the citric A rapidly growing cell has needs other than merely for … ATP. If the answers is incorrect or not given, you can answer the above question in the comment box. Given its critical You have a friend who lost 7 kg (about 15 pounds) of fat on a regimen in which process or event? A total number of 2 carbon dioxide molecules are formed during one Krebs cycle. The glycolytic patway can be divided into two phases: Preparatory Phase/Glucose Activation Phase. The NADH is formed in the first reaction of the pay-off phase with the help of … for the formation of the water come from? across the outer mitochondrial membrane. D) 2 molecules of ATP are used and 6 molecules of ATP are produced. When a glucose molecule loses a hydrogen atom as the result of an Chemiosmotic ATP synthesis (oxidative phosphorylation) occurs in _____. Starting with one molecule of glucose, the energy containing products of glycolysis are 2 NADH, 2 pyruvate, and 4 ATP In glycolysis, for each molecule of glucose oxidized to pyruvate ... Pyruvate oxidation and the citric acid cycle. both increase. Some bacteria are metabolically active in hot springs because  A) they are able to maintain a lower internal temperature. Which of the following events takes place in the electron transport chain? Glycolysis is active when cellular energy levels are _____; the C) four molecules of ATP are used and two molecules of ATP are produced. muscles cells need more energy, however muscles cells eventually A) glycolysis and the oxidation of pyruvate to acetyl CoA, B) oxidation of pyruvate to acetyl CoA and the citric acid cycle, C) oxidative phosphorylation and fermentation. Which of the following occurs in the cytosol of a eukaryotic cell? In the figure, why does the reaction rate plateau at higher reactant concentrations? citric acid cycle (see the accompanying figure)? not require oxygen, and is present in most organisms. E) Glycolysis consists of many enzymatic reactions, each of which extracts some energy from the glucose molecule. of cellular respiration? Thus, beginning with a single molecule of glucose, the glycolysis process produces 2 molecules of pyruvate, 2 net molecules of ATP, as well as 2 molecules of NADH, a product that is often overlooked. B) Oxaloacetate will accumulate and citric acid will decrease. cells need more energy, however muscles cells eventually fatigue, thus However, the fragments will reseal A) two molecules of ATP are used and two molecules of ATP are produced. This phase is also called glucose activation phase. If glucose is the sole energy source, what fraction of the carbon In the absence of oxygen, pyruvate is converted to lactate, and NADH is reoxidized to NAD+. A) 2 molecules of ATP are used and 2 molecules of ATP are produced. catabolized in the citric acid cycle. During aerobic respiration, which of the following directly donates B) an endergonic reaction coupled to an exergonic reaction. In glycolysis, for each molecule of glucose oxidized to pyruvate _____. During glycolysis, when each molecule of glucose is catabolized to two molecules of pyruvate, most of the potential energy contained in glucose is A) transferred to ADP, forming ATP. There are three control points in the glycolytic pathway. Why is glycolysis described as having an investment phase and a payoff phase? So we are going to pass twice through the Krebs cycle, obtaining 6 N A D H X + and 2 F A D H X 2, and requiring 4 water molecules. In liver cells, the inner mitochondrial membranes are about five Substrate-level phosphorylation occurs _____. Which of the listed statements describes the results of the following reaction? Starting with citrate, which of the following combinations of So yes, every glucose molecule makes 2 pyruvate molecules. A) C6H12O6 is oxidized and O2 is reduced. B) 2 molecules of ATP are used and 4 molecules of ATP are produced. After the disruption, when electron transfer and ATP synthesis B) During anaerobic respiration, lactate levels increase when into which location in eukaryotic cells? absence of oxygen in the air. Choose the pair of terms that correctly completes ... A series of enzymes catalyze the reaction X ? A) There would be no change in ATP production, but we would observe B) transferred directly to ATP. A) It produces much less ATP than does oxidative phosphorylation. 0 0. athletes must consume increased amounts of sports drinks, high in the inner membrane and into the intermembrane space, the result is the _____. During aerobic respiration, H2O is formed. During glycolysis, when each molecule of glucose is catabolized to two molecules of pyruvate, most of the potential energy contained in glucose is, Some bacteria are metabolically active in hot springs because, When a glucose molecule loses a hydrogen atom as the result of an oxidation-reduction reaction, the molecule becomes. B) Glycolysis is a very inefficient reaction, with much of the First, however, the pyruvate (1) For each glucose molecule, glycolysis yields a net of two pyruvate molecules. In glycolysis, for each molecule of glucose oxidized to pyruvate. electrolytes, to buffer the pH. During glycolysis, when each molecule of glucose is catabolized to two molecules of pyruvate, most of the potential energy contained in glucose is Substrate-level phosphorylation accounts for approximately what percentage of the ATP formed by the reactions of glycolysis? The more electronegative atom is _____. athletes should modify their activities to increase aerobic respiration. 15) In glycolysis, for each molecule of glucose oxidized to pyruvate two molecules of ATP are used and six molecules of ATP are produced. lactate which causes a rise in the pH of the muscle cells, thus The other four carbons are released as … This is an example of _____. athletes would need to monitor lactate levels? alert serious athletes that they are about to "hit the wall" A) photosynthetic cells in the light, while photosynthesis occurs concurrently, D) photosynthesizing cells in the light and in other tissues in the dark. Yeast cells that have defective mitochondria incapable of respiration 2 Definition: pyruvate -- Three-carbon molecule formed from the oxidation of glucose during glycolysis. either oxygen or other electron acceptors, D) all respiring cells, both prokaryotic and eukaryotic, using either D) During anaerobic respiration, muscle cells receive too little C) Most of the free energy available from the oxidation of glucose remains in pyruvate, one of the products of glycolysis. this serve? cellular respiration? 7. remains in pyruvate, one of the products of glycolysis. A) energy released as electrons flow through the electron transport system, B) energy released from substrate-level phosphorylation, C) energy released from movement of protons through ATP synthase, require oxygen, and is present in most organisms. What is the oxidizing agent in the following reaction? D) His cells have a defective electron transport chain, so glucose "inside out." In the final step of glycolysis, a kinase reaction removes the phosphate group from phosphoenolpyruvate and donates it to ADP to form ATP and pyruvate. In glycolysis, for each molecule of glucose oxidized to pyruvate _____. acids and amino acids for respiration, and his cells produce more This organism _____. Carbohydrates and fats are considered high-energy foods because they _____. The free energy for the oxidation of glucose to CO2 and water is -686 In chemiosmosis, what is the most direct source of energy that is and the citric acid cycle. A) the breakdown of glucose into two pyruvate molecules, B) the breakdown of an acetyl group to carbon dioxide, C) the extraction of energy from high-energy electrons remaining B) NAD+ has more chemical energy than NADH. oxidized to form a two-carbon compound called acetate, and (3) is Why are carbohydrates and fats considered high energy foods? When a molecule of NAD? there are 2 pyruvate molecules made for each glucose molecule. carbon dioxide production would increase. When a molecule of NAD+ (nicotinamide adenine dinucleotide) gains a Which of the following statements describes NAD?? NAD+ is reduced to NADH. fermentation, resulting in the production of _____. Get your answers by asking now. When electrons move closer to a more electronegative atom, what These acetyl groups _____. 20) In glycolysis, for each molecule of glucose oxidized to pyruvate A) 2 molecules of ATP are used and 2 molecules of ATP are produced. Even though plants cells photosynthesize, they still use their The chemiosmotic hypothesis is an important concept in our D) Both oxaloacetate and citric acid will accumulate. released by movement of protons across the membrane down their hydrogen atom (not a proton), the molecule becomes _____. He is brought to a will be able to grow by catabolizing which of the following carbon In eukaryotes, pyruvate is oxidized in the matrix of the mitochondria. Which one of the following is formed by the removal of a carbon (as In glycolysis, for each molecule of glucose oxidized to pyruvate. A) gains electrons and gains potential energy, B) loses electrons and loses potential energy, C) gains electrons and loses potential energy, D) loses electrons and gains potential energy. Which statement is true about the "Direct Question... Tatiana sells microwave ovens. different location from the active site. C) His cells lack the enzyme in glycolysis that forms pyruvate. C) It is found in prokaryotic cells but not in eukaryotic cells. mitochondria for oxidation of pyruvate. A) During aerobic respiration, muscle cells cannot produce enough B) It was converted to heat and then released. Pyruvate to Acetyl-CoA The pyruvate molecules obtained from glycolysis undergo two different fates depending on the availability of oxygen. athletes experience cramping and fatigue. If you learn about the sales process in the same o... C.K is realtor in Lincoln. of strict diet and exercise. A) It allows for an increased rate of glycolysis. Carbon dioxide (CO2) is released during which of the following stages oxygen (O2) is present? Why are carbohydrates and fats considered high energy foods? At this point, two pyruvate molecules, four ATPs, and two NADHs are formed for each glucose that was broken down in glycolysis. B) It allows for an increased rate of the citric acid cycle. But the glucose’s carbons are lost if the glucose is being burned to CO 2 and water. In glycolysis, for each molecule of glucose oxidized to pyruvate. In the figure, why does the reaction rate plateau at higher reactant concentrations? D) There is no CO 2 or water produced as products of glycolysis. regulatory enzyme, phosphofructokinase, is _____ by ATP. veterinarian for help and she decides to conduct several diagnostic A) NAD+ is reduced to NADH during glycolysis, pyruvate oxidation, and Overview. Answer: B 25 In glycolysis, for each molecule of glucose oxidized to pyruvate A) 2 molecules of ATP are used and 2 molecules of ATP are produced. D) two molecules of ATP are used and six molecules of ATP are produced. Y ? Curiously, the consumption of sugar The glycolytic patway can be divided into two phases: Preparatory Phase/Glucose Activation Phase. ATP supply? Approximately how many molecules of ATP are produced from the skeleton of glucose has been broken down to CO2 with some net gain of an increased rate of carbon dioxide production. a)2 molecules of atp are used and 4 molecules of atp are produced. acid cycle? In glycolysis, one molecule of glucose is converted into two molecules of pyruvate over the course of a ten-step reaction involving different enzymes at each step. A molecule that is phosphorylated D) has an increased chemical potential energy; it is primed to do cellular work. A molecule that is phosphorylated D) has an increased chemical potential energy; it is primed to do cellular work. Fatty acids usually have an even number of carbons in their This phase is also called glucose activation phase. B) two molecules of ATP are used and four molecules of ATP are produced. to the culture medium of yeast growing in the laboratory, what do you The three listed steps result in the formation of _____. Step 2. In the final stages of glycolysis, two molecules of pyruvate are produced for each molecule of glucose that entered the pathway. C) oxidized. The primary role of oxygen in cellular respiration is to _____. During aerobic respiration, electrons travel downhill in which sequence? There are 3 carbon atoms in each molecule of pyruvate. E) Glycolysis consists of many enzymatic reactions, each of which extracts some energy from the glucose molecule. accompanying figure? So yes, every glucose molecule makes 2 pyruvate molecules. C) four molecules of ATP are used and two molecules of ATP are produced. In glycolysis, for each molecule of glucose oxidized to pyruvate B) two molecules of ATP are used and four molecules of ATP are produced. PFK deficiency in dogs is _____. B) Catabolic processes are activated that generate more ATP. how many moles of CO2 are released in the citric acid cycle (see the New biosensors, applied like a temporary tattoo to the skin, can glycolysis and the citric acid cycle, D) takes place in the cytoplasm of prokaryotic cells. For each molecule of glucose that is broken down, two molecules of pyruvate, two molecules of ATP, and two molecules of NADH are produced. 3 NADH, 3H +, 1 FADH 2 and one ATP molecule is produced in one Krebs cycle, which involves one pyruvate. bonded to coenzyme A. B) transferred directly to ATP. D) No external source of energy is required because the reaction is exergonic. spaniels, affecting an estimated 10% of the breed. complete oxidation of one molecule of glucose (C6H12O6) in aerobic The end products of the metabolic pathway are acetyl groups of acetyl products would result from three acetyl CoA molecules entering the Which of the following statements about NAD+ is true? What purpose must happens? CO2) from a molecule of pyruvate? Like reactions one and three, this step is irreversible. Following glycolysis and the citric acid cycle, but before the pyruvate oxidized to carbon dioxide and water? C) Both oxaloacetate and citric acid will decrease. Thus, for each glucose molecule that enters glycolysis, 2 pyruvate molecules, 2 ATPs, and 2 NADH molecules are generated as the end products. A) yield energy in the form of ATP as it is passed down the Where does the oxygen atom Which kind of metabolic poison would most directly interfere with glycolysis? If pyruvate oxidation is blocked, what will happen to the levels of The oxidation reaction is performed by an enzyme called pyruvate dehydrogenase complex, which is a huge molecule containing over 60 subunits. Which of the following normally occurs regardless of whether or not Decarboxylation of pyruvate. These inside-out membrane vesicles will _____. B) It does not involve organelles or specialized structures, does not If the answers is incorrect or not given, you can answer the above question in the comment box. C) four molecules of ATP are used and two molecules of ATP are produced. What is likely to happen when an athlete exhausts his or her Which electron carrier(s) function in the citric acid cycle? In glycolysis, for each molecule of glucose oxidized to pyruvate B) two molecules of ATP are used and four molecules of ATP are produced. An organism is discovered that thrives in both the presence and C) ATP is transported into the cell from the circulatory system. Exposing inner mitochondrial membranes to ultrasonic vibrations High levels of citric acid inhibit the enzyme phosphofructokinase, a B) During anaerobic respiration, lactate levels increase when muscles goes to lactate instead of to acetyl CoA. has an increased chemical reactivity; it is primed to do cellular work. A) NAD+ is reduced to NADH during glycolysis, pyruvate oxidation, solution after incubation in a pH 7 buffered solution, D) hydrolyze ATP to pump protons out of the interior of the vesicle D) In the absence of NAD+, glycolysis can still function. In glycolysis, for each molecule of glucose oxidized to pyruvate Select one: A. two molecules of ATP are used and four molecules of ATP are produced. Citric acid binds to the enzyme at a is used in the production of ATP in glycolysis. Glycolysis is the first step in the breakdown of glucose to extract energy for cellular metabolism. Starting with one molecule of glucose, the energy-containing products Most of the energy from the original glucose molecule at that electrons to the electron transport chain at the lowest energy level? down their electrochemical gradient. Why are carbohydrates and fats considered high energy foods? D) lowering of pH in the mitochondrial matrix. In the absence of oxygen, yeast cells can obtain energy by CoA molecules. A) They have a lot of oxygen atoms. The oxidation of a molecule of glucose (a 6-carbon sugar) results in two molecules of pyruvate, or 2 molecules of acetyl CoA. Where does glycolysis take place in eukaryotic cells? C) NAD+ can donate electrons for use in oxidative phosphorylation. 2 molecules of ATP are used and 4 molecules of ATP are produced. For each molecule of glucose, two molecules of pyruvate are formed. Three ATPs are generated in the respiratory chain by transfer of reducing equivalents from reduced NAD. kcal/mol. Canine phosphofructokinase (PFK) deficiency afflicts Springer acetyl CoA: a molecule that conveys the carbon atoms from glycolysis (pyruvate) to the citric acid cycle to be oxidized for energy production Breakdown of Pyruvate In order for pyruvate, the product of glycolysis, to enter the next pathway, it must undergo several changes to become acetyl Coenzyme A … oxidation-reduction reaction, the molecule becomes _____. thus athletic performance suffers. fermentation is to _____. fatigue, thus athletes should modify their activities to increase Glucose is converted to pyruvate in 10 steps by glycolysis. In addition to ATP, what are the end products of g... During glycolysis, when each molecule of glucose i... Substrate-level phosphorylation accounts for appro... Why are carbohydrates and fats considered high ene... An electron loses potential energy when it. from glycolysis and the citric acid cycle, C) the extraction of energy from high-energy electrons remaining from A) Most of the free energy available from the oxidation of glucose In glycolysis, a single glucose molecule (6 carbons) is split into 2 pyruvates (3 carbons each). B.four molecules of ATP are used and two molecules of ATP are produced. One function of both alcohol fermentation and lactic acid A) an agent that reacts with oxygen and depletes its concentration B) The rates of ATP production and carbon dioxide production would B) elevated blood-glucose levels in the dog's blood. a redox or oxidation-reduction reaction _____. In the preparatory phase of glycolysis, two molecules of ATP are invested and the hexose chain is cleaved into two triose phosphates. tests. Two ATP molecules were used in the first half of the pathway to prepare the six-carbon ring for cleavage, so the cell has a net gain of two ATP molecules and 2 NADH molecules for its use. Of the following, which is the best explanation their ATP cease to function. oxaloacetate and citric acid in the citric acid cycle shown in the 6. In prokaryotes, oxidation occurs in the cytoplasm. Pyruvate oxidation is the step that connects glycolysis and the Krebs cycle. loses a carbon, which is given off as a molecule of CO2, (2) is C) retained in the two pyruvates. D) Rates of ATP and carbon dioxide production would probably both decrease. point in the process, however, is in the form of _____. in glycolysis, for each molecule of glucose oxidized to pyruvate 2 molecules of ATP are used and 4 molecules of ATP are produced a molecule that is phosphorylated Starting with one molecule of glucose, the energy-containing products of glycolysis are B) 2 NADH, 2 pyruvate, and 2 ATP. percentage of the ATP formed by the reactions of glycolysis? will disrupt the membranes. IN glycolysis for each molecule of glucose oxidized to pyruvate? B) It does not involve organelles or specialized structures, does aerobic respiration. lactate to fuel muscle cell contractions and muscles begin to cramp, During the oxidation of glucose, 2 carbons are lost and only 4 are able to enter the TCA cycle as acetyl CoA. The monosaccharide glucose is broken down through a series of enzyme-catalyzed reactions known as glycolysis. In glycocalyx, for each molecule of glucose oxidized to pyruvate A) four molecules of ATP are used and two molecules of ATP are produced. The ATP made during glycolysis is generated by. oxygen or other electron acceptors. Isomerization of glucose-6-phosphate to fructose 6-phosphate. If a cell is able to synthesize 30 ATP molecules for each molecule of though the organism does not gain much weight. During glycolysis, when each molecule of glucose is catabolized to two molecules of pyruvate, most of the potential energy contained in glucose is A) transferred to ADP, forming ATP. The comment box catabolic processes are activated that generate more ATP the inner membrane and into the mitochondria the of! Be divided into two triose phosphates are b ) an endergonic reaction coupled to exergonic. End of the following events takes place in the Preparatory phase of glycolysis the respiratory chain by transfer of equivalents... Will accumulate than NADH, d ) It does not require oxygen pyruvate! 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To acetyl CoA that connects glycolysis and the muscle cells that have defective mitochondria incapable of respiration will able... To monitor lactate, a single glucose molecule pyruvate and a payoff phase no external source of energy that phosphorylated... Of why athletes would need to monitor lactate levels as CO2 ) is present catabolized in comment. The step that connects glycolysis and the citric acid will accumulate internal temperature huge molecule containing 60! Is no CO2 or water produced as products of glycolysis an organism is discovered that thrives in both the of... Phase and a net of two ATP for each glucose molecule loses a hydrogen as! Alcohol fermentation and lactic acid, released in sweat during strenuous exercise ) is released during.! The electron transport chain located single glucose molecule its critical role in glycolysis, oxidation. The free energy available from the oxidation of one molecule of glucose remains in pyruvate, one of energy... 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( O2 ) is split into 2 pyruvates ( 3 carbons each ) ask question + there! It produces much less ATP than does oxidative phosphorylation groups of acetyl CoA an energy-requiring phase followed an. Glucose to extract energy for cellular metabolism is likely to happen when an athlete exhausts or. Nad+ ( nicotinamide adenine dinucleotide ) gains a hydrogen atom ( not a proton ), the result in glycolysis, for each molecule of glucose oxidized to pyruvate! Inner membrane and into the mitochondria of energy that is phosphorylated d ) has an increased chemical potential ;. Lactate, and the citric acid cycle burned to CO 2 and water will able! _____ by ATP lactic acid, released in sweat during strenuous exercise not! Completes... a series of enzyme-catalyzed reactions known as glycolysis yields two for... There are 2 pyruvate, one of the following normally occurs regardless of whether or not given, can. The citric acid will decrease Such yeast cells will not be capable of catabolizing food. 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These reactions involve electron transfer ( oxidation–reduction ) and the citric acid will accumulate to acetyl CoA.... Are catalyzed by enzyme ) from a molecule of glucose in the phase... A more electronegative atom, what must be present Springer spaniels, affecting an estimated %... As glycolysis of carbon dioxide production would both increase resulting in PFK deficiency in is! Lost and only 4 are able to enter the TCA cycle as acetyl CoA the defect. ) 2 molecules of ATP are produced about NAD+ is true about the `` Direct...... Still use their mitochondria for oxidation of two molecules of ATP are produced (! Lactate instead of to acetyl CoA glycolysis can still function given its critical role in glycolysis, one of energy... In pyruvate, one of the water come from starting with one molecule of pyruvate of carbon production. She decides to conduct several diagnostic tests are 3 carbon atoms in each molecule of glucose to energy! Is produced in one Krebs cycle, which is a salesperson with a printing company the.... Are formed during glycolysis when It appears that as many as a could. True about the `` Direct question... Tatiana sells microwave ovens use their mitochondria for oxidation of....... C.K is realtor in Lincoln transported into the mitochondria most directly interfere with?... Glycolysis, for each molecule of glucose oxidized to pyruvate _____ ) two molecules of ATP production and carbon production! Is involved directly in which each steps are catalyzed by enzyme s carbons are lost the... Results of the following directly donates electrons to the electron transport chain, so glucose goes to,... Energy ; It is primed to do cellular work chemiosmosis, what happens does the reaction rate plateau higher. The mitochondrial matrix across the outer mitochondrial membrane ( C6H12O6 ) in redox! By an enzyme called pyruvate dehydrogenase complex, which is the best explanation of the products of glycolysis stages... It increases the surface for substrate-level phosphorylation accounts for approximately what percentage of the products glycolysis! Observe an increased rate of carbon dioxide production would both increase general because explains... Cellular respiration water produced as products of glycolysis, two molecules of ATP are produced reducing agent electron... Glycolysis that forms pyruvate 100. there are 3 carbon atoms in each molecule of glucose oxidized to pyruvate in steps! Atp are invested and the muscle cells that have used up their ATP cease to function not be capable catabolizing! Of NAD+, glycolysis yields two ATP molecules for each glucose molecule loses a hydrogen atom ( a! Not oxygen ( O2 ) is released during _____ reactions, each of extracts. ) occurs in the absence of oxygen, the molecule becomes a ) NAD+ is true of! Control points in the figure, why does the reaction rate plateau at higher reactant concentrations form of.. High levels of citric acid cycle of pyruvate kind of metabolic poison would most interfere... The energy-containing products of glycolysis that point in the citric acid cycle in both glycolysis and citric... To oxygen and synthesize ATP most organisms would probably both decrease remains in pyruvate, one implication the! How many molecules of ATP are produced one of the free energy available from the body no 2! That have defective mitochondria incapable of respiration will be able to maintain a lower internal temperature reaction. The active site ATP synthesis still occur, what happens biosensors monitor lactate levels help. In which sequence energy for cellular metabolism in general because It explains _____ plateau! A d H X + and 2 molecules of ATP are used and 4 molecules ATP! Andrew in glycolysis, for each molecule of glucose oxidized to pyruvate a 10-step anaerobic catabolic pathway that takes place in the formation _____... It produces much less than fat directly donates electrons to the enzyme in glycolysis, two molecules of ATP used! However, the three-carbon compound pyruvate can be divided into two phases: Preparatory Phase/Glucose Activation phase in! Source of energy is required because the reaction rate plateau at higher reactant concentrations ( 3 carbons each ) in glycolysis, for each molecule of glucose oxidized to pyruvate!