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Where does acetyl CoA accumulate during cellular respiration?

During cellular respiration, acetyl CoA accumulates in which location? It increases the surface for oxidative phosphorylation. In liver cells, the inner mitochondrial membranes are about five times the area of the outer mitochondrial membranes.

What is Acetyl CoA in cellular respiration?

Acetyl-CoA is an important biochemical molecule in cellular respiration. It is produced in the second step of aerobic respiration after glycolysis and carries the carbon atoms of the acetyl group to the TCA cycle to be oxidized for energy production.

Why do we need acetyl CoA?

Acetyl-CoA (acetyl coenzyme A) is a molecule that participates in many biochemical reactions in protein, carbohydrate and lipid metabolism. Its main function is to deliver the acetyl group to the citric acid cycle (Krebs cycle) to be oxidized for energy production.

What is the fate of pyruvate in the presence of oxygen?

In the presence of oxygen, pyruvate is converted to acetyl-CoA and then enters the citric acid cycle. More ATP can be formed from the breakdown of glucose when oxygen is present.

When oxygen is not present what is pyruvate converted to?

When oxygen is not present, pyruvate will undergo a process called fermentation. In the process of fermentation the NADH + H+ from glycolysis will be recycled back to NAD+ so that glycolysis can continue. In the process of glycolysis, NAD+ is reduced to form NADH + H+.

What happens if oxygen is present after glycolysis?

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 is the fate of pyruvate in aerobic cellular respiration?

Under aerobic conditions pyruvate is oxidized to acetate, which enters the citric acid cycle (Chapter 15) and is oxidized to CO2 and H2O. The NADH formed by the dehydrogenation of glyceraldehyde-3-phosphate is reoxidized to NAD+ by passage of its electrons to O2 in the process of mitochondrial respiration (Chapter 18).

What are two types of cellular respiration?

There are two main types of cellular respiration—aerobic respiration and anaerobic respiration. Aerobic respiration is a specific type of cellular respiration, in which oxygen (O2) is required to create ATP.

What is pyruvate in cellular respiration?

Pyruvate is an important chemical compound in biochemistry. It is the output of the metabolism of glucose known as glycolysis. One molecule of glucose breaks down into two molecules of pyruvate, which are then used to provide further energy, in one of two ways.

Is pyruvate involved in cellular respiration?

Cellular respiration is the process your cells use to produce usable energy in the form of ATP. Pyruvate is the molecule that feeds the Krebs cycle, our second step in cellular respiration.

What role does glucose play in cellular respiration?

During cellular respiration, a glucose molecule is gradually broken down into carbon dioxide and water. Along the way, some ATP is produced directly in the reactions that transform glucose. Much more ATP, however, is produced later in a process called oxidative phosphorylation.

What is the major difference between photosynthesis and cellular respiration as shown here?

While water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water. While photosynthesis requires carbon dioxide and releases oxygen, cellular respiration requires oxygen and releases carbon dioxide.

What is the correct order of cellular respiration?

Ch. 9 Honors Biology Cellular Respiration

Question Answer
What is the correct sequence of stages of cellular respiration? glycolysis, Krebs Cycle, Electron Transport Chain
What is the correct equation for cellular respiration? C6H12O6 + 6 O2 –> 6 CO2 + 6 H2O
What are the products of cellular respiration? CO2, H2O, ATP

What are the 4 Subreactions of cellular respiration in the correct order?

Usually, this process uses oxygen, and is called aerobic respiration. It has four stages known as glycolysis, Link reaction, the Krebs cycle, and the electron transport chain.