Which of the following statement is incorrect?

Options

A. isolated metabolic reactions in vitro are not living things but surely living reactions
B. All organisms from the prokaryotes to the most complex eukaryotes have self-consciousness.
C. The sum total of all the chemical reactions curing in our body is metabolism.
D. Metabolic reactions can be demonstrated outside the body in cell-free system

Answer

To determine which statement is incorrect, we will evaluate each of the provided options one by one.

### Step-by-Step Solution:

1. **Evaluate Statement 1**: "Isolated metabolic reactions in vitro are not living things but surely living reactions."
- **Analysis**: This statement is correct. In vitro reactions occur outside the living organism, but they can mimic the metabolic processes that occur in living organisms. Therefore, while they are not living entities themselves, they represent living reactions.

2. **Evaluate Statement 2**: "All organisms from the prokaryotes to the most complex eukaryotes have self-consciousness."
- **Analysis**: This statement is incorrect. Self-consciousness is a trait associated with higher animals and humans. Prokaryotes (like bacteria) do not possess self-consciousness. Therefore, this statement is false.

3. **Evaluate Statement 3**: "The sum total of all the chemical reactions occurring in our body is metabolism."
- **Analysis**: This statement is correct. Metabolism refers to all the biochemical reactions that occur within a living organism, including both anabolic (building up) and catabolic (breaking down) processes.

4. **Evaluate Statement 4**: "Metabolic reactions can be demonstrated outside the body in a cell-free system."
- **Analysis**: This statement is also correct. Metabolic reactions can indeed be studied outside of living organisms in a controlled environment, such as in test tubes or other laboratory settings.

### Conclusion:
After analyzing all the statements, the incorrect statement is **Statement 2**: "All organisms from the prokaryotes to the most complex eukaryotes have self-consciousness."