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When oxygen is plentiful pyruvate from glucose is converted to?
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∙ 10y ago
acetyl CoA
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∙ 10y ago
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What is is the order of the steps for cellular respiration?
1. Glucose is metabolised to form pyruvate (glycolysis) Anaerobic (without oxygen): - Pyruvate is converted to lactate or ethanol Aerobic (in the presence of oxygen): - Pyruvate is converted to acetyl CoA - Citric Acid Cycle - Electron transport chain
What are the different ways in which glucose is oxidised to provide energy?
The first step is breaking down of glucose as a six carbon molecule into a three carbon molecule is called pyruvate may be converted into ethanol and carbon dioxide .this process take place in yeast during fermentation
Can glycolysis occur if oxygen is present?
Normally glucose is converted to two pyruvate molecules which are then oxidized in the Krebs cycle. Since oxygen is required for this step the pyruvate accumulates and is converted to lactate. In the body lactate is can be converted to glucose in the liver and in some other tissues.What happens is that pyruvate can accept these Hs. By accepting these Hs, pyruvate becomes Lactic Acid and the co-enzymes are freed to return to glycolysis to pick up more hydrogen's, glucose continues to provide energy anaerobically
In which organelle does aerobic cellular respiration take place?
aerobic respiration means the oxidation of nutrients using oxygen to produce energy. it is a 4 step process. step 1 The glucose is converted to pyruvate in the cytoplasm of the cell in te absence of oxygen. this process is called glycolysis. Each glucose molecule produces 2 molecules of pyruvate. 1 Glucose----> 2Pyruvate step 2 The pyruvate formed is converted to acetyl CoA in the cytoplasm. step 3 The acetyl CoA is sent to the mitochondria of the cell where it takes part in the Kreb's cycle. it occurs in the presence of O2 this acetyl CoA can easil enter the mitochondria which is the site for further reactions. step 4 the energy produced in the above steps is converted to ATP using ATP synthase enzyme. A total of 36 ATP molecules are produced. The overall reaction for aerobic respiration is Glucose------> Pyruvate-------> CO2 + H2O + 36ATP Energy
What are the reactants of glycosis?
Glycolysis is the breakdown of glucose into pyruvate. There are ten reactions in glycolysis. The reactants are glucose, glucose 6-phosphate, fructose 6-phosphate, fructose 1,6 bisphosphate, dihydroxyacetone phosphate, glyceraldehyde 3-phosphate, 1, 3-bisphosphoglycerate, 3-phosphoglycerate, 2-phosphoglycerate, phosphoenolpyruvate and water.
What is pyruvate converted into when oxygen is not present?
lactate
During glycolosys glucose molecules is broken into?
In glycolysis, one 6-carbon glucose molecule is converted into two 3-carbon pyruvate molecules. If no oxygen is present then each of those two pyruvate molecules will be converted into 3-carbon lactate (lactic acid).
What is is the order of the steps for cellular respiration?
1. Glucose is metabolised to form pyruvate (glycolysis) Anaerobic (without oxygen): - Pyruvate is converted to lactate or ethanol Aerobic (in the presence of oxygen): - Pyruvate is converted to acetyl CoA - Citric Acid Cycle - Electron transport chain
What are the different ways in which glucose is oxidised to provide energy?
The first step is breaking down of glucose as a six carbon molecule into a three carbon molecule is called pyruvate may be converted into ethanol and carbon dioxide .this process take place in yeast during fermentation
What is the starting material of glycolysis?
in glycolysis beginning material is 1 mol. of glucose and ending material is 2mol. pyruvate.
Can glycolysis occur if oxygen is present?
Normally glucose is converted to two pyruvate molecules which are then oxidized in the Krebs cycle. Since oxygen is required for this step the pyruvate accumulates and is converted to lactate. In the body lactate is can be converted to glucose in the liver and in some other tissues.What happens is that pyruvate can accept these Hs. By accepting these Hs, pyruvate becomes Lactic Acid and the co-enzymes are freed to return to glycolysis to pick up more hydrogen's, glucose continues to provide energy anaerobically
What are the stages of Cellular respiration.?
The Stages of Cellular Respiration 1. Glucose is converted to pyruvate producing a small amount of ATP and NADH. 2. When oxygen is present, pyruvate and NADH are used to make a large amount of ATP. When oxygen isn't present, pyruvate is converted to either lactate or ethanol and carbon dioxide. In Stage One, the breakdown of glucose happens, with glycolysis. In Stage Two, ATP is produced. Stage one is called the Calvin cycle, and stage two is called the Krebs cycle. For more information, go to http://Biology.about.com/od/cellularprocesses/a/cellrespiration.htm
Muscle cells when an individual is excerising heavily and when the muscle becomes oxygen deprived convert pyruvate to lactate What happens to the lactate in the skeletal muscle cells?
The lactate is taken to the liver and converted back to pyruvate.
When human muscles are deprived of oxygen, they are unable to fully metabolize glucose via aerobic respiration. Instead, the pyruvate made in glycolysis is reduced to form lactic acid?
To regenerate NAD+
What is Pyruvic Acid?
Pyruvate or Pyruvic acid is the end product of the anaerobic portion of glycolysis. If the cell has enough oxygen to run aerobic respiration then pyruvate is converted into acetyl-CoA and carbon dioxide byt eh enzyme pyruvate carboxylase. If there isn't enough oxygen in the cell, then pyruvate is converted to lactic acid in order to free up some of the required reactants(NAD+). This allows anaerobic glycolysis to continue.an ester or salt of pyruvic acid.Pyruvate is an organic acid, which can be formed from glucose through glycolysis, can form lactic acid, provides energy for cells in the citric acid cycle, and can be converted to fatty acids or carbohydrates.
What is EMP pathway?
The series of biochemical reactions in which glucose is broken down to pyruvate with the release of usable energy in the form of ATP. One molecule of glucose undergoes two phosphorylation reactions and is then split to form two triose-phosphate molecules. Each of these is converted to pyruvate. The net energy yield is two ATP molecules per glucose molecule. In aerobic respiration pyruvate then enters the citric-acid-cycle. Alternatively, when oxygen is in short supply or absent, the pyruvate is converted to various products by anaerobic respiration. Other simple sugars, e.g. fructose and galactose, and glycerol (from fats) enter the glycolysis pathway at intermediate stages.
How do muscles get energy when there is low levels of oxygen?
They can get some energy out of glycolysis, or the splitting of glucose into pyruvate, and the pyruvate can be fermented into lactic acid, producing more energy. This lactic acid is why your muscles get sore after oxygen deprivation.
