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 analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement A**: "Isolated metabolic reactions in vitro are not living things but surely living reactions."
- **Analysis**: This statement is correct. In vitro refers to experiments conducted outside of a living organism, often in a controlled laboratory environment. While these reactions are not part of a living organism, they are indeed metabolic reactions that can occur under laboratory conditions.

2. **Statement B**: "All organisms from the prokaryotes to the most complex eukaryotes have self-consciousness."
- **Analysis**: This statement is incorrect. Prokaryotes, such as bacteria, do not possess self-consciousness. Self-consciousness is a trait associated with more complex organisms, particularly certain eukaryotes. Therefore, this statement is the one that is incorrect.

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

4. **Statement D**: "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 and demonstrated outside of living organisms in controlled environments, such as test tubes or other lab settings.

### Conclusion:
The incorrect statement among the options provided is **Statement B**.