How is molecular oxygen reduced?

Molecular oxygen can be reduced to superoxide through a one electron transfer process.

During which step of aerobic respiration is oxygen reduced to form water?

Reduction or Oxidation

In the first step, which scientists call glycolysis, glucose breaks down. In the second, aerobic respiration breaks the remains of the glucose down further. During aerobic respiration, oxygen is reduced, donating an electron to hydrogen to form water.

What respiration process produces water?

aerobic cellular respiration
During aerobic cellular respiration, glucose reacts with oxygen, forming ATP that can be used by the cell. Carbon dioxide and water are created as byproducts.

What processes requires molecular oxygen?

The electron transport system is the only metabolic process listed that directly requires molecular oxygen. Oxygen is the final electron acceptor (it is one of the most electronegative atoms in our bodies) in the electron transport chain.

Is oxygen reduced in cellular respiration?

Cellular respiration is an oxidative process whereby an electron donor is oxidized and oxygen is reduced to produce carbon dioxide, water, and energy [3].

Which is a reduced molecule?

Reduction is the loss of oxygen atom from a molecule or the gaining of one or more electrons. A reduction reaction is seen from the point of view of the molecule being reduced, as when one molecule gets reduced another gets oxidised. The full reaction is known as a Redox reaction.

What is produced when oxygen takes electrons in water?

intermembrane space to the matrix. When oxygen accepts electrons, water is produced as a byproduct.

What process requires no oxygen?

Glycolysis, which is the first step in all types of cellular respiration is anaerobic and does not require oxygen.

Which process requires oxygen in aerobic cellular respiration?

Glycolysis can take place without oxygen in a process called fermentation. The other three stages of cellular respiration—pyruvate oxidation, the citric acid cycle, and oxidative phosphorylation—require oxygen in order to occur.

What is the reduced form of the coenzyme NAD quizlet?

Another coenzyme and electron carrier in redox reactions. Oxidized form: NAD+. Reduced form: NADH + H+.

When oxygen is absent the end product of glycolysis is converted to?

When oxygen is absent, the end product of glycolysis, i.e. pyruvate is converted to lactic acid or ethanol and CO2 by fermentation. It is called anaerobic respiration.

Why is it beneficial for pyruvate to be reduced?

Why is it beneficial for pyruvate to be reduced via fermentation when oxygen is not available? All of the choices are advantages: -The organism can survive short spells of anaerobic conditions and maintain growth and reproduction. -Fermentation can provide a rapid burst of ATP.

What is the reduced form of the coenzyme NAD?

The reduced form of NAD is designated as NADH and oxidized form as NAD+. Each form helps to carry electrons from one reaction to another. It also plays a vital role in energy production via redox reactions. Therefore, the correct answer is (a) NADH.

What best describes the reduction of the coenzyme NAD?

Which of the following best describes the reduction of the coenzyme NAD? a proton and an electron. true or false: Whenever a molecule is oxidized, another molecule must be reduced. true or false: NADH serves as an electron carrier that can donate its hydrogen to other molecules.

Which of the following best describes the reduction of the coenzyme NAD+ quizlet?

Cells obtain energy by oxidizing food molecules such as glucose. Which of the following best describes the reduction of coenzyme NAD? A proton and an electron. Whenever a molecule is oxidized, another molecule must be reduced.

Is NAD+ or NADH the reduced form?

The two forms of NAD constitute a redox couple. This term is used to describe reduced and oxidized forms of the same molecule. The NAD+ Is the oxidized form, that is, a state in which it loses an electron. NADH is a reduced form of the molecule, which means that it gains the electron lost by NAD+.

How is NAD reduced to NADH?

In glycolysis and the Krebs cycle, NADH molecules are formed from NAD+. Meanwhile, in the electron transport chain, all of the NADH molecules are subsequently split into NAD+, producing H+ and a couple of electrons, too. … In each of the enzymatic reactions, NAD+ accepts two electrons and a H+ from ethanol to form NADH.

Is NAD+ oxidized or reduced in glycolysis?

In the process of glycolysis, NAD+ is reduced to form NADH + H+. If NAD+ is not present, glycolysis will not be able to continue. During aerobic respiration, the NADH formed in glycolysis will be oxidized to reform NAD+ for use in glycolysis again.