There has been a mix-up in the lab, and you have been asked to decipher which vial of cell-free extract is from which experiment: one on glycolysis, one on the citric acid cycle, and one on the electron transport chain and chemiosmosis.

Vial Oxaloacetate Pyruvate Carbon Dioxide ATP
1 100 0 40 5
2 0 50 0 5
3 0 0 0 80
Based on this data, identify which vial goes with which experiment and explain why.

To identify which vial corresponds to each experiment, we need to analyze the data provided.

The key molecules involved in each experiment are oxaloacetate (glycolysis), pyruvate (citric acid cycle), and ATP (electron transport chain and chemiosmosis). We can compare the data for these molecules in each vial to determine which experiment it belongs to.

Let's analyze the data for each vial in relation to the key molecules:

Vial 1:
- Contains 100 units of oxaloacetate (glycolysis)
- Does not contain any pyruvate (citric acid cycle)
- Produces 40 units of carbon dioxide (citric acid cycle)
- Produces 5 units of ATP (electron transport chain and chemiosmosis)

Vial 2:
- Does not contain any oxaloacetate (glycolysis)
- Contains 50 units of pyruvate (citric acid cycle)
- Does not produce any carbon dioxide (citric acid cycle)
- Produces 5 units of ATP (electron transport chain and chemiosmosis)

Vial 3:
- Does not contain any oxaloacetate (glycolysis)
- Does not contain any pyruvate (citric acid cycle)
- Does not produce any carbon dioxide (citric acid cycle)
- Produces 80 units of ATP (electron transport chain and chemiosmosis)

Based on this analysis, we can conclude that:
- Vial 1 belongs to the citric acid cycle experiment, as it produces carbon dioxide and contains no pyruvate.
- Vial 2 belongs to the glycolysis experiment, as it contains no oxaloacetate and only has pyruvate.
- Vial 3 belongs to the electron transport chain and chemiosmosis experiment, as it produces a high amount of ATP and does not have any key molecules from the other experiments.

In summary:
- Vial 1 corresponds to the citric acid cycle experiment.
- Vial 2 corresponds to the glycolysis experiment.
- Vial 3 corresponds to the electron transport chain and chemiosmosis experiment.