The main by-product of respiration is carbon dioxide. During the process of cellular respiration, glucose (a simple sugar) is broken down in the presence of oxygen to produce energy in the form of ATP (adenosine triphosphate). This process occurs in several stages, including glycolysis, the Krebs cycle, and oxidative phosphorylation.

In the Krebs cycle, which takes place in the mitochondria, pyruvate (derived from glucose) is converted into acetyl-CoA, and along with other reactions, carbon dioxide is produced as a waste product. Ultimately, for each glucose molecule that undergoes respiration, two molecules of carbon dioxide are generated. Oxygen is consumed in this process, while ATP is produced to power cellular activities. Therefore, carbon dioxide and water are the primary by-products of respiration, with carbon dioxide being the most significant one in the context of gas exchange in living organisms.

### Final Answer
**Carbon dioxide** is the main by-product of respiration.

Question

The main by-product of respiration is carbon dioxide. During the process of cellular respiration, glucose (a simple sugar) is broken down in the presence of oxygen to produce energy in the form of ATP (adenosine triphosphate). This process occurs in several stages, including glycolysis, the Krebs cycle, and oxidative phosphorylation.

In the Krebs cycle, which takes place in the mitochondria, pyruvate (derived from glucose) is converted into acetyl-CoA, and along with other reactions, carbon dioxide is produced as a waste product. Ultimately, for each glucose molecule that undergoes respiration, two molecules of carbon dioxide are generated. Oxygen is consumed in this process, while ATP is produced to power cellular activities. Therefore, carbon dioxide and water are the primary by-products of respiration, with carbon dioxide being the most significant one in the context of gas exchange in living organisms.

### Final Answer
**Carbon dioxide** is the main by-product of respiration.

Knowee AI · Accepted Answer

The main by-product of respiration is carbon dioxide. During the process of cellular respiration, glucose (a simple sugar) is broken down in the presence of oxygen to produce energy in the form of ATP (adenosine triphosphate). This process occurs in several stages, including glycolysis, the Krebs cycle, and oxidative phosphorylation.

In the Krebs cycle, which takes place in the mitochondria, pyruvate (derived from glucose) is converted into acetyl-CoA, and along with other reactions, carbon dioxide is produced as a waste product. Ultimately, for each glucose molecule that undergoes respiration, two molecules of carbon dioxide are generated. Oxygen is consumed in this process, while ATP is produced to power cellular activities. Therefore, carbon dioxide and water are the primary by-products of respiration, with carbon dioxide being the most significant one in the context of gas exchange in living organisms.

### Final Answer
**Carbon dioxide** is the main by-product of respiration.

What is the main by-product of respiration?Group of answer choicesCarbon dioxideCellular wasteATPOxygen

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What is the main by-product of respiration?

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