Where does the electron transport chain take place quizlet?

mitochondria

Where does the electron transport chain take place in cellular respiration?

Is any ATP used in the electron transport chain?

No ATP is produced in the electron transport chain. Is any ATP used in the electron transport chain? No, the electrons provide energy. The name of the embedded protein that provides a channel for the hydrogen ions to pass through the membrane is ATP synthase.

What is the purpose of the electron transport chain?

Explanation: The electron transport chain is primarily used to send protons across the membrane into the intermembrane space. This create a proton-motive force, which will drive ATP synthase in the final step of cellular respiration to create ATP from ADP and a phosphate group.

What is the electron transport chain summary?

The electron transport chain is a cluster of proteins that transfer electrons through a membrane within mitochondria to form a gradient of protons that drives the creation of adenosine triphosphate (ATP). ATP is used by the cell as the energy for metabolic processes for cellular functions.

How does the electron transport chain work?

In the electron transport chain, electrons are passed from one molecule to another, and energy released in these electron transfers is used to form an electrochemical gradient. In chemiosmosis, the energy stored in the gradient is used to make ATP.

What is the electron transport chain also known as?

The respiratory chain, otherwise known as the electron transport chain, resides in the mitochondria. The chain consists of a series of electron carriers which can accept and then donate electrons, while the resulting production of energy is used to stimulate the formation of ATP via oxidative phosphorylation.

What is the electron transport chain also known as quizlet?

STUDY. Electron Transport Chain. A sequence of electron carrier molecules (membrane proteins) that shuttle electrons during the redox reactions that release energy used to make ATP.

What are the components of electron transport chain?

Components of the Electron Transport Chain

• Complex I = NADH-Q reductase complex.
• Complex III= Cytochrome c reductase complex.
• Cyt C = Cytochrome c.
• Complex IV = Cytochrome c oxidase complex.

Is FADH2 an electron carrier?

FADH2: High energy electron carrier used to transport electrons generated in Glycolysis and Krebs Cycle to the Electron Transport Chain.

What are the 3 electron carriers?

Oxidation-reduction reactions always happen in matched pairs; no molecule can be oxidized unless another is reduced.

• Flavin Adenine Dinucleotide. Flavin adenine dinucleotide, or FAD, consists of riboflavin attached to an adenosine diphosphate molecule.
• Nicotinamide Adenine Dinucleotide.
• Coenzyme Q.
• Cytochrome C.

Is pyruvate an electron carrier?

In fermentation, the final electron acceptor is pyruvate (lactic acid fermentation), acetaldehyde (alcohol fermentation), or some other organic molecule. In cellular respiration, the final electron acceptor is oxygen. During fermentation, energy stored in pyruvate is unavailable to the cell.

Is glucose an electron donor?

In other words, oxygen is being used as the final electron acceptor. This generates the most ATP for a cell, given the large amount of distance between the initial electron donor (glucose) and the final electron acceptor (oxygen), as well as the large number of electrons that glucose has to donate.

Can electron transport chain occur without oxygen?

Oxygen is the final electron acceptor in the electron transport chain, which allows for oxidative phosphorylation. Without oxygen, the electrons will be backed up, eventually causing the electron transport chain to halt.

What happens to pyruvate when oxygen is present?

In Summary: Pyruvate Oxidation In the presence of oxygen, pyruvate is transformed into an acetyl group attached to a carrier molecule of coenzyme A. The resulting acetyl CoA can enter several pathways, but most often, the acetyl group is delivered to the citric acid cycle for further catabolism.

What happens after glycolysis if no oxygen is present?

Although glycolysis doesn’t require oxygen, the fate of the pyruvate molecules depends on whether oxygen is present. If oxygen isn’t available, the pyruvate is converted to lactate, and no additional ATP is produced from this conversion. If oxygen is present, the pyruvates are transported into the mitochondrial matrix.

What happens in glycolysis when oxygen is present?

In the presence of oxygen, the next stage after glycolysis is oxidative phosphorylation, which feeds pyruvate to the Krebs Cycle and feeds the hydrogen released from glycolysis to the electron transport chain to produce more ATP (up to 38 molecules of ATP are produced in this process).

What 2 processes can happen after glycolysis when there is no oxygen present?

Some organisms are able to continually convert energy without the presence of oxygen. They undergo glycolysis, followed by the anaerobic process of fermentation to make ATP.

What happens if there is not enough oxygen for aerobic respiration?

Aerobic respiration requires oxygen. In aerobic respiration, one molecule of glucose is broken down to produce 34 to 36 molecules of ATP, the energy currency of the cell. If there was no oxygen available, aerobic respiration would stop and organsims that rely on aerobic respiration would die.

Why do cells need to regenerate NAD+?

In both aerobic and anaerobic metabolism, NADH must be converted back to its oxidized state, NAD, or the cell will eventually run out of this coenzyme. The TCA cycle generates more NADH molecules, which are used to produce ATP. Under anaerobic conditions, the regeneration of NAD is coupled to the reduction of pyruvate.

What happens to a material in the absence of oxygen?

Cellular respiration always begins with glycolysis, which can occur either in the absence or presence of oxygen. Cellular respiration that proceeds in the absence of oxygen is anaerobic respiration. Cellular respiration that proceeds in the presence of oxygen is aerobic respiration.

What happens to the high energy electrons and hydrogen held by NADH if there is no oxygen?

What happens to the high-energy electrons (and hydrogen) held by NADH if there is no O2 present? If no oxygen is present, the pyruvate must take the electrons (and their hydrogen) back.

What stage of cellular respiration produces oxygen?

Lesson Summary. Cellular respiration uses energy in glucose to make ATP. Aerobic (“oxygen-using”) respiration occurs in three stages: glycolysis, the Krebs cycle, and electron transport. In glycolysis, glucose is split into two molecules of pyruvate.

What would happen if o2 wasn’t present in the electron transport chain to be the final electron acceptor?

When no oxygen is present, the electron transport chain can’t run because there is no oxygen to act as the final electron acceptor. This means that the ETC will not be accepting electrons from NADH as its source of power, so NAD+ will not be regenerated.

What stage of cellular respiration produces water?

electron transport chain