Which statement correctly compares and contrasts the three stages of cellular respiration that occur in the presence of oxygen? Each stage occurs in the mitochondria, but only the final stage produces ATP. Each stage produces ATP but only the third stage occurs in the mitochondria. Each stage produces ATP but only the first stage occurs in the cytoplasm. Each stage occurs in the cytoplasm, but only the final stage produces ATP.

## Step 1<br />Cellular respiration is a process that cells use to produce energy from glucose. This process occurs in three stages: glycolysis, the Krebs cycle, and oxidative phosphorylation.<br /><br />## Step 2<br />Glycolysis is the first stage of cellular respiration and it occurs in the cytoplasm of the cell. This stage does not require oxygen and it is the only stage that produces ATP without the use of oxygen.<br /><br />## Step 3<br />The Krebs cycle and oxidative phosphorylation are the second and third stages of cellular respiration. These stages occur in the mitochondria of the cell. These stages require oxygen and they produce ATP through oxidative phosphorylation.<br /><br />## Step 4<br />Based on the above information, the correct statement is "Each stage produces ATP, but only the first stage occurs in the cytoplasm." This is because glycolysis (the first stage) occurs in the cytoplasm, while the Krebs cycle and oxidative phosphorylation (the second and third stages) occur in the mitochondria.