When glucose is metabolized, it yields a net of 30-32 ATP molecules through glycolysis and oxidative phosphorylation. In contrast, glycogen, which is a polymer of glucose, can yield approximately 33-36 ATP molecules due to the fact that its breakdown bypasses one ATP investment step in glycolysis. This difference arises because glycogen is converted to glucose-1-phosphate, which is then converted to glucose-6-phosphate, allowing for a more efficient ATP production. Overall, glycogen metabolism provides a higher ATP yield compared to free glucose.
2Actually it produces four. But two are used in the mechanism
Excess glucose that is not needed for immediate ATP production can be stored as glycogen in the liver and muscles for later use. If glycogen stores are full, the excess glucose is converted into fat for long-term energy storage.
2
Glycogenolysis is when Glucose, galactose, and fructose are carbonhydrates are together in a cycle. --- My answer from my biochemistry class: -Glycogenolysis is the metabolism of glycogen. -In the liver, glycogen synthesis and degradation are regulated to maintain blood-glucose levels as required to meet the needs of the organism as a whole. -In muscle, the processes are regulated to meet the energy needs of the muscle itself. -Consists of 3 steps: 1. the release of glucose-1-phosphate from glycogen. 2. The remodeling of the glycogen substrate to permit further degradation. 3. The conversion of glucose-1-phosphate into glucose-6-phosphate for further metabolism. -glucose-6-phosphate has 3 fates: 1. it is the initial substrate for glycolysis 2. it can be converted into free glucose for release into the bloodstream 3. it can be processed by the pentose phosphate pathway to yield NADPH and ribose derivatives.
Glycogen is synthesized by the enzyme glycogen synthase, which adds glucose molecules together to form a long chain of glycogen. This process requires energy in the form of ATP and occurs primarily in the liver and muscles when blood glucose levels are high. Glycogen serves as a storage form of glucose for the body to use when needed.
Gross yield of ATP during glycolysis: 4Net yield of ATP during glycolysis: 2 (anaerobic glycolysis of a glucose molecule took 2 ATP to accomplish so subtract 2 ATP from your gross yield of 4...therefore it's 2 for net yield).Kreb cycle: produces a total of 2ATP (one each time it happens and it happens twice).
The Krebs cycle generates 1 ATP molecule per turn through substrate-level phosphorylation. Due to the cycle occurring twice per glucose molecule, a total of 2 ATP molecules are produced per glucose molecule entering the cycle.
glucose & glycogen
2Actually it produces four. But two are used in the mechanism
In substrate level phosphorylation, the ADP is phosphorylated directly by the transfer of phosphate group from substrate. If we consider glucose, then we get four substrate level phosphorylated ATPs, net gain of two in glycolysis and other two are formed when the two pyruvate molecules formed after glycolysis enter the TCA cycle.
The molecule needed to start glycolysis is glucose. Glucose is a simple sugar that serves as the initial substrate for the glycolytic pathway, which then breaks down glucose into smaller molecules to produce energy in the form of ATP.
Excess glucose that is not needed for immediate ATP production can be stored as glycogen in the liver and muscles for later use. If glycogen stores are full, the excess glucose is converted into fat for long-term energy storage.
2
Glycogenolysis is when Glucose, galactose, and fructose are carbonhydrates are together in a cycle. --- My answer from my biochemistry class: -Glycogenolysis is the metabolism of glycogen. -In the liver, glycogen synthesis and degradation are regulated to maintain blood-glucose levels as required to meet the needs of the organism as a whole. -In muscle, the processes are regulated to meet the energy needs of the muscle itself. -Consists of 3 steps: 1. the release of glucose-1-phosphate from glycogen. 2. The remodeling of the glycogen substrate to permit further degradation. 3. The conversion of glucose-1-phosphate into glucose-6-phosphate for further metabolism. -glucose-6-phosphate has 3 fates: 1. it is the initial substrate for glycolysis 2. it can be converted into free glucose for release into the bloodstream 3. it can be processed by the pentose phosphate pathway to yield NADPH and ribose derivatives.
Glycogen is synthesized by the enzyme glycogen synthase, which adds glucose molecules together to form a long chain of glycogen. This process requires energy in the form of ATP and occurs primarily in the liver and muscles when blood glucose levels are high. Glycogen serves as a storage form of glucose for the body to use when needed.
In glycolysis, one glucose molecule produces a net yield of two ATP molecules at the end of the process.
The actual yield of ATP from the complete oxidation of glucose in aerobic respiration is 30-32 molecules of ATP per molecule of glucose. This range accounts for the fact that the efficiency of ATP production can vary depending on cellular conditions.