AP BIOLOGY

Detailed explanation-1: -CO2 is released during respiration and forms the product of respiration. Whereas in photosynthesis, the carbon dioxide molecule is fixed to form glucose.

Detailed explanation-2: -The products of cellular respiration are carbon dioxide, ATP, and water. During the production of acetyl-CoA from pyruvate, two carbon dioxide are formed. An additional four carbon dioxide are formed during the Krebs cycle. This carbon dioxide is transferred to the blood and then taken to the lungs.

Detailed explanation-3: -Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by-products and ATP is energy that is transformed from the process.

Detailed explanation-4: -Carbon dioxide is an important side product of both glycolysis and the citric acid cycle (Krebs cycle). This oxidized carbon represents an end product of metabolism that, ultimately, needs to be removed using transport to the lungs and subsequent expiration out into the surrounding environment.