How many CO2 molecule release during kreb cycle for 1 glucose molecule?

Question

Answer

1》TCA cycle when NAD+pyruvate +co-enyme A,react to from NADH2,CO2 and acetyl Coenzyme A.
>>Here 2 Co2 molecules are released.
SECOND EMISSION =
》Decarboxylation 1(steps in Kreb's cycle)
>>Oxalo succinic reacts with oxalosuccinate decarboxylase to from alpha-keto glucarate and Co2~~~
>>>>Here also 2 molecules will be released as we have started by two pyruvate molecules. (One glucose=two pyruvates).
...》Also next EMISSION is when there is oxidative decarboxylation ...
Alpha keto glucarate+NADH+Coenzyme A react in the presence of alpha-ketoglucaratedehydrogenase to give stable product like Succinyl Coenzyme A+NADH2 and Co2 .
>>>>Again 2 molecules..
so=in total 6 molecules of Co2 from one glucose molecule.
so..answer is 6..

Answer

Three times carbon dioxide is released during the course of aerobic respiration once during oxidative decarboxylation of pyruvate and two during the kerbs or citric acid cycle .

Answer

Krebs Cycle and CO2 Production

The Krebs Cycle, also known as the citric acid cycle or the tricarboxylic acid cycle, is a series of enzymatic reactions that occur in the mitochondria of cells. It plays a crucial role in the cellular respiration process, specifically in the oxidation of glucose to generate energy in the form of ATP.

Overview of the Krebs Cycle:
1. The Krebs Cycle starts with the entry of Acetyl-CoA, which is derived from the breakdown of glucose or other fuel molecules.
2. Acetyl-CoA combines with a four-carbon molecule called oxaloacetate to form a six-carbon molecule called citrate.
3. Citrate undergoes a series of reactions, resulting in the release of carbon dioxide (CO2), the production of ATP, and the regeneration of oxaloacetate for the next round of the cycle.
4. The cycle involves several intermediate molecules, including citrate, isocitrate, alpha-ketoglutarate, succinyl-CoA, succinate, fumarate, and malate.

CO2 Release in the Krebs Cycle:
During the Krebs Cycle, carbon dioxide molecules are released as a byproduct of several reactions. Here is a breakdown of the CO2 production for one glucose molecule:

1. Step 1: The conversion of pyruvate to Acetyl-CoA
- In the presence of oxygen, each glucose molecule is first converted to two molecules of pyruvate through glycolysis.
- Each pyruvate then enters the mitochondria, where it is converted to Acetyl-CoA.
- This conversion results in the release of one carbon dioxide molecule per pyruvate.
- Therefore, for one glucose molecule, two pyruvate molecules are produced, leading to the release of two carbon dioxide molecules.

2. Step 2: The Krebs Cycle reactions
- For each Acetyl-CoA entering the Krebs Cycle, two carbon dioxide molecules are released.
- Since one glucose molecule generates two Acetyl-CoA molecules, a total of four carbon dioxide molecules are released during the Krebs Cycle for one glucose molecule.

Total CO2 Release:
The carbon dioxide released during the conversion of pyruvate to Acetyl-CoA and the subsequent Krebs Cycle reactions can be summarized as follows:
- Two carbon dioxide molecules are released during the conversion of pyruvate to Acetyl-CoA.
- Four carbon dioxide molecules are released during the Krebs Cycle.
- Therefore, a total of six carbon dioxide molecules are released during the entire process for one glucose molecule.

Note: It is important to mention that the Krebs Cycle occurs twice for each glucose molecule, as two pyruvate molecules are generated from glycolysis. Hence, the total CO2 production is doubled to twelve carbon dioxide molecules for one glucose molecule.

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Select the wrong statement

How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to CO2 and H2O yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal?

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