Can someone explain to me the process of glycolysis before Kreb's Cycle?
920961
Step 1 - ATP is invested by adding a P to glucose\n          Step 2 - Glucose-6-P is convertedinto Fructose-6-P\nStep 3 - A second ATP is invested \nStep 4 - The 6 carbon molecule issplit into two three carbon molecules.\nStep 4.5 - Dihydroxyacetone -P is converted into 3-P-glyceraldehyde\nStep 6 - every subsequent step occurs 2xNADH is produced as another P is added\nStep 7 - (2) ATP is recovered\nStep 8 - The P is moved from the 3-carbon to the 2-carbon\nStep 9 - A structural change is made\nStep 10 - (2) ATP is recovered\nStep 11 - NADH is produced anda CO2 is produced\n2 pyruvate are made from the process
59980
thats a pretty loaded question there...the best I can summarize is:\nglycolysis:\nglucose + 2ATP + 2NAD+ +4ADP + 2Pi= 2 pyruvate + 2 ADP + 2 NADH + 2H+ + 2ATP + 2H20\nthis takes place in the cytoplasm of the cell\n\nKreb's/TCA/Citric Acid Cycle:\n3 NADH + FADH2 + 2CO2 for each turn of the cycle\nthis happens in the mitochondria\n\nETC:\nhappens in the mitochondrial matrix but is hard to explain without diagrams...basically you get +2.5ATP for each NADH that goes through and +1.5 ATP for each FADH2 that goes through
180005
Glycolysis is the breakdown of glucose into 2 molecules of pyruvate.  It occurs in the cytosol of the cell.  There are 10 enzyme-catalyzed steps, in which 2 net molecules of ATP are produced.
294234
* The process begins with the oxidation of pyruvate, producing one CO2, and one acetyl-CoA.\n    * Acetyl-CoA reacts with the four carbon carboxylic acid, oxaloacetate--to form the six carbon carboxylic acid, citrate.\n    * Through a series of reactions citrate is converted back to oxaloacetate. This cycle produces 2 CO2 and consumes 3 NAD+, producing 3NADH and 3H+.\n    * It consumes 3 H2O and consumes one FAD, producing one FADH+.\n    * 1st turn end= 1 ATP, 3 NADH, 1 FADH2\n    * Since there are two molecules of Pyruvic acid to deal with, the cycle turns once more.\n    * The complete end result= 2 ATP, 6 NADH, 2 FADH2
798769
1. Glycolysis\n2. lactate\n3. 8\n3. fermentation\n6. FADH2 and NADH
147120
Aerobic glycolysis of glucose to pyruvate, requires two equivalents of ATP to activate the process, with the subsequent production of four equivalents of ATP and two equivalents of NADH. Thus, conversion of one mole of glucose to two moles of pyruvate is accompanied by the net production of two moles each of ATP and NADH. \n\nGlucose + 2 ADP + 2 NAD+ + 2 Pi -----> 2 Pyruvate + 2 ATP + 2 NADH + 2 H+\n\nThe NADH generated during glycolysis is used to fuel mitochondrial ATP synthesis via oxidative phosphorylation, producing either two or three equivalents of ATP depending upon whether the glycerol phosphate shuttle or the malate-aspartate shuttle is used to transport the electrons from cytoplasmic NADH into the mitochondria. The net yield from the oxidation of 1 mole of glucose to 2 moles of pyruvate is, therefore, either 6 or 8 moles of ATP. Complete oxidation of the 2 moles of pyruvate, through the TCA cycle, yeilds an additional 30 moles of ATP; the total yield, therefore being either 36 or 38 moles of ATP from the complete oxidation of 1 mole of glucose to CO2 and H2O. Got it?
960676
There is a delicate balance of Krebs Cycle intermediates, as different physiological conditions require different amounts of each one.  For example, if the body needs to make glucose (gluconeogenesis), it may remove oxaloacetate for this pathway.  Or if it is low for a specific amino acid, it may pull out certain Krebs Cycle intermediates to synthesize it, or it may use citrate to synthesize fatty acids. \n\nGenerally there is also reverse reactions that FILL UP Krebs Cycle intermediates.
1021234
&^&^&^\nCellular respiration is the process of oxidizing food molecules, like glucose, to carbon dioxide and water. The energy released is trapped in the form of ATP for use by all the energy-consuming activities of the cell.\n\nThe process occurs in two phases: \n1. glycolysis, the breakdown of glucose to pyruvic acid \n2. the complete oxidation of pyruvic acid to carbon dioxide and water (Krebs citric acid cycle)
145055
Aerobic respiration requires oxygen in order to generate energy. It is the preferred method of pyruvate breakdown from glycolysis and requires that pyruvate enter the mitochondrion to be fully oxidized by the Krebs cycle. The product of this process is energy in the form of ATP (Adenosine Triphosphate), by substrate-level phosphorylation, NADH and FADH2. The reducing potential of NADH and FADH2 is converted to more ATP via an electron transport chain with oxygen as the "terminal electron acceptor". Most of the ATP produced by cellular respiration is by oxidative phosphorylation, ATP molecules are made due to the chemiosmotic potential driving ATP synthase. Respiration is the process by which cells obtain energy when oxygen is present in the cell.\n\nTheoretically, 36 ATP molecules can be made per glucose during cellular respiration, however, such conditions are generally not realized due to such losses as the cost of moving pyruvate into mitochondria. Aerobic metabolism is rather more efficient than anaerobic metabolism. They share the initial pathway of glycolysis but aerobic metabolism continues with the Krebs cycle and oxidative phosphorylation. The post glycolytic reactions take place in the mitochondria in eukaryotic cells, and at the cell membrane in prokaryotic cells.\n\nGlycolysis\nMain article: Glycolysis \nGlycolysis is a metabolic pathway that is found in all living organisms and does not require oxygen. The process converts one molecule of glucose into two molecules of pyruvate, and makes energy in the form of two net molecules of ATP. Four molecules of ATP per glucose are actually produced but two are consumed for the preparatory phase. The initial phosphorylation of glucose is required to destablise the molecule for cleavage into two triose sugars. During the pay-off phase of glycolysis four phosphate groups are transfered to ADP by substrate-level phosphorylation to make four ATP and two NADH are produced when the triose sugars are oxidised. Glycolysis takes place in the cytoplasm of the cell. The overall reaction can be expressed this way:\n\nGlucose + 2 ATP + 2 NAD+ + 2 Pi + 4 ADP → 2 pyruvate + 2 ADP + 2 NADH + 4 ATP + 2 H2O + 4 H+ \n\nOxidative decarboxylation\nMain article: Oxidative decarboxylation \nProduces acetyl-CoA from pyruvate. This oxidation reaction also releases carbon dioxide as a product.\n\nKrebs cycle/Citric Acid cycle\nMain article: Citric acid cycle \nWhen oxygen is present, acetyl-CoA enters the citric acid cycle, and gets oxidised to CO2 while at the same time reducing NAD to NADH. NADH can be used by the electron transport chain to create further ATP as part of oxidative phosphorylation. To fully oxidise the equivalent of one glucose molecule two acetyl-CoA must be metabolised by the Krebs cycle. Two waste products, H2O and CO2 are created during this cycle, .\n\nOxidative phosphorylation\nMain articles: Oxidative phosphorylation , Electron transport chain , Electrochemical gradient, and ATP synthase\n\nIn eukaryotes, oxidative phosphorylation occurs in the mitochondria. It comprises of the electron transport chain that establishes a proton gradient (chemiosmotic potential) across the inner membrane by oxidising the NADH produced from the Krebs cycle. ATP is synthesised by the ATP synthase enzyme when the chemiosmotic gradient is used to drive the phosphorylation of ADP.\n\nTheoretical yields\nThe yields in the table below are for one glucose and molecule being fully oxidised to carbon dioxide. It is assumed that all the reduced coenzymes are oxidised by the electron transport chain and used for oxidative phosphorylation.
144155
Look up "Krebs cycle".
619926
atp phosphorylses the glucose to form glucose phosphate - this energises glucose and makes it more reactive, so that the subsequent steps of glycolysis (anaerobic respiration) are able to occur.\n\nif the glucose was not energised, it would not split into two to form triose phosphate, and would not form pyruvate (and therefore lactate) as it is not reactive enough.\n\n\nglycolysis reaction:\n\nglucose +atp => glucose phosphate + adp => 2triose phosphate  => 2 pyruvate\n\nThen NADH, a hydrogen carrier, supplies H+ ions to the pyruvate so it is converted into lactate.
1063075
Gluconeogenesis is the process of the body creating sugar (glucose) from sources other than carbohydrates or glycogen (percursor to glucose... stored in the liver).  Most commonly the sources are from proteins and fats/\n\nGlycogenesis is when the body converts stored glycogen into glucose.  Glycogen is easier for the body to store than glucose, but it has to be converted to glucose before it can be used by the body.\n\nGlycolysis is the breakdown of glucose.... usually to excrete it from the body.  LYSIS= destruction or breakdown.
698351
Phosphoglycerate mutase catalyzes the migration of a phosphoryl group from the C-3 position of 3-phosphoglycerate to the C-2 position. This glycolytic enzyme is a tetramer with four identical subunits.♥ \n\nCheck out this link for more:\nhttp://www.chem.uwec.edu/Modeling/GGProteinStructures/Pages/prs3b11.htm
1130819
when we take in the food during the process of respiration the glucose is broken down to pyruvic acid CH3COC0OH BY THE process of glycolysis , initially by taking oxygen by cytoplasm . when it gets more oxygen the pyruvic acid enters mitochondria and is converted to CO2 AND H20 . This cycle is called KREB's cyle . the synthesis of ATP molecule takes place in the F1 particle of mitochondria . \nthe equaton is \nC6H12O6+O2---->CH3C0COOH + O2--->CO2 + H20 \nthis process is called aerobic trespiration \nrespiration involves oxidation of food ....\nthus kreb cycle is aerobic respiration and increase in oxygen increases it !!!!!\nPLEASE VOTE IT AS THE BEST ANSWER IF YOU LIKE IT ..PLEASE......\nI THINK I HAVE ANSWERED YOUR MANY QUERIES
884310
C is false since NADH is produced during glycolysis as well as during the TCA cycle, unlike FADH2 which is prodcued only in the TCA cycle.  Remember TCA takes place in the mitochondria and glycolysis is in the cytosol.
348749
Glucose 6 phosphate is only immobilised by the attachment of the phophate group so that it cannot escape from the cell. Cells do not have the trasport machinery to export phosphorylated sugars. Further more, gluocse-6-phosphate formation does not guarantee glycolysis will continue, neither does the formation of F-6-P for that matter. This is because these intermediates can join pathways other than glycolysis. G-6-P for instance can join the Pentose Phosphate Pathway. So The G-6-P has to be oxidized to F-6-P and the F-6-P has to be reduced to F-1,6-bisphosphate. The F-1,6-BP formation is the committing step in glycolysis and hence naturally one of the regulation steps. It definitely will go into glycolysis. So oxidation of the intermediate G-6-P to F-6-P is needed and this has to be further oxidized to F-1,6-BP.
910685
The pathway of glycolysis can be seen as consisting of 2 separate phases. The first is the chemical priming phase requiring energy in the form of ATP, and the second is considered the energy-yielding phase. In the first phase, 2 equivalents of ATP are used to convert glucose to fructose 1,6-bisphosphate (F1,6BP). In the second phase F1,6BP is degraded to pyruvate, with the production of 4 equivalents of ATP and 2 equivalents of NADH.