Select the INCORRECT statement from the following .

Options

A. All biomolecules show turnover in cell.
B. There is no uncatalysed reaction in living system .
C. Metabolic pathways are either linear or circular
D. Living state is an equilibrium steady state to perform work .

Answer

To solve the question, we need to analyze each statement provided and identify which one is incorrect.

1. **Statement 1**: "All carbon compounds that we get from living tissues can be called biomolecules. Biomolecules show turnover in cells."
- This statement is **correct**. Biomolecules, which include proteins, nucleic acids, carbohydrates, and lipids, are indeed carbon compounds derived from living tissues, and they do undergo turnover in cells, meaning they are constantly being synthesized and degraded.

2. **Statement 2**: "There is no uncatalyzed reaction in living systems."
- This statement is also **correct**. In living organisms, all metabolic reactions are catalyzed by enzymes. Even simple processes like the dissolution of gases in liquids are facilitated by biological mechanisms.

3. **Statement 3**: "Metabolic pathways can be linear or circular."
- This statement is **correct**. Metabolic pathways can indeed be categorized as linear (like glycolysis) or circular (like the TCA cycle), which describes the flow of metabolites through these pathways.

4. **Statement 4**: "Living state is an equilibrium steady state."
- This statement is **incorrect**. Living organisms are not in a state of equilibrium; they are in a dynamic non-equilibrium state. This is because systems at equilibrium cannot perform work, and living organisms are constantly undergoing metabolic processes that require energy and thus cannot be at equilibrium.

**Conclusion**: The incorrect statement is **Statement 4**: "Living state is an equilibrium steady state."