The unique features of Haldane's hot dilute soup was

Options

A. its molecules did not show any degradation as there was no free oxygen and enzymes.
B. it had C, H and O in gaseous form.
C. its temperature was suited to provide environment for formation of first cell.
D. it contained enzymes to accelerate reactions .

Answer

To answer the question about the unique features of Haldane's hot dilute soup, we can break down the explanation into several key points:

### Step-by-Step Solution:

1. **Formation of the Soup**: Haldane's hot dilute soup refers to the primordial environment on early Earth where organic molecules were believed to have formed. This soup was created after torrential rains dissolved salts and minerals, which then accumulated in depressions, forming the oceans.

**Hint**: Think about how environmental conditions can lead to the accumulation of essential elements for life.

2. **Prebiotic Soup**: The term "prebiotic soup" was coined by Haldane to describe this mixture of organic compounds in water. It signifies a stage where the building blocks of life were present before the emergence of living cells.

**Hint**: Remember that "prebiotic" indicates a time before biological life existed, focusing on the chemical precursors.

3. **Absence of Degradation**: In this hot dilute soup, organic molecules accumulated because there were no enzymes or free oxygen to degrade them. This lack of degradation allowed for the concentration of organic compounds necessary for the development of life.

**Hint**: Consider why the absence of certain elements (like oxygen) is crucial for the preservation of organic molecules.

4. **Energy Source**: The external energy necessary for chemical reactions in the soup was provided by the Sun. This energy facilitated the formation of complex organic molecules from simpler ones.

**Hint**: Think about how energy sources are vital for chemical reactions, especially in a primordial setting.

5. **Temperature Conditions**: The temperature of this environment was high, which was suitable for the formation of the first cells. This elevated temperature helped in the synthesis of organic compounds.

**Hint**: Reflect on how temperature can influence chemical reactions and the formation of biological structures.

### Conclusion:
Based on these points, the unique features of Haldane's hot dilute soup include its role as a prebiotic environment rich in organic compounds, the absence of degradation due to lack of enzymes and oxygen, the presence of external energy from the Sun, and suitable temperature conditions for the formation of early life.

### Final Answer:
The correct options regarding the unique features of Haldane's hot dilute soup are:
- Organic molecules accumulated due to the absence of degradation.
- The temperature was suitable for the formation of the first cells.