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-The pyruvates produced in glycolysis are converted to Acetyl CoA molecules, which enter the Krebs cycle.

-Acetyl-CoA combines with a four-carbon compound, forming a six-carbon compound and releasing CoA.

-CO2 (carbon dioxide) is released from the compound, making a five carbon compound. Electrons are transferred to NAD+, making NADH.

- CO2 is released from the five-carbon compound, making a four-carbon compound. One molecule of ATP is made, as is a molecule of NADH.

-The four-carbon compound is converted into a new four-carbon compound; electrons are transferred to FAD, making FADH2.

-The four-carbon compound is converted to the original compound that started the cycle. Another molecule of NADH is produced.

Overall, NADH and FADH2 are the electron carriers that have all the high energy electrons, ready to be donated in the next step of cell respiration. 2 ATP molecules are produced, and carbon dioxide was released.

Next, the electrons carried by NADH and FADH2 go through something called the electron transport chain; the electrons are donated through a chain, where they lose energy through every molecule it passes through. The energy is used to power hydrogen ions OUT of the mitochondria's inner compartments; this creates a concentration gradient, where the H+ ions diffuse back in. By diffusing back in, the carrier protein that it diffuses through makes ATP. On average, ETC makes 32 ATP. When the electrons are used up, they bind with hydrogen ions and oxygen molecules. This results in water- H2O. Oxygen is the final electron acceptor, and water is a waste product.

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Adolf Rohan

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Minerva Orn

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During the Krebs cycle,pyruvic acid is broken down into carbon dioxide in a series of energy-extracting reactions

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βˆ™ 12y ago

During the Krebs cycle,pyruvic acid is broken down into carbon dioxide in a series of energy-extracting reactions

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Q: What happens during the Kreb's cycle?
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Related questions

What happens during Krebs cycle?

During the Krebs cycle,pyruvic acid is broken down into carbon dioxide in a series of energy-extracting reactions


What happens during the Krebs cycle when carbon bonds are rearranged?

energy is released!


What gas is in the Krebs cycle?

The gas evolved during the Krebs cycle is carbon dioxide (CO2).


What is the waste product form during the Krebs cycle?

A byproduct of the krebs cycle/citric acid cycle is carbon dioxide.


What generally happens in the Krebs cycle?

In Krebs cycle, there’s the breakdown of a 2 carbon molecule called acetyl coA to release CO2 and generate energy (ATP). This video explains it best πŸ”₯ β€œKrebs cycle @ Dr Hills Academy on YouTube”


During what cycle do a series of reactions occur in the mitochondria which release carbon dioxide?

Citric acid cycle


What is removed from the molecules during the kreb cycle?

electrons, protons, CO2 and water. btw it is not "kreb cycle" but Krebs cycle (mr. Hans Krebs discovered it ;)


Which one is formed during the Krebs cycle FADH2 or pyruvic acid?

FADH2 since pyruvic acid is needed to START the Krebs cycle


What's the Krebs cycle?

Krebs cycle refers to the sequence of reactions that allow living cells to generate energy during aerobic respiration.


When oxygen is available a cell will begin what happens after glycolysis?

krebs cycle


The area inside the cristae where the Krebs cycle happens is the?

it is called the matrix. :)


What is the area inside the cristae where the Krebs cycle happens?

it is called the matrix. :)