Which biologist gave most logical biochemical theory of origin of life?

Options

A. Urey
B. Oparin
C. Stanley Miller
D. Haeckel

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the biologist who proposed the most logical biochemical theory of the origin of life.

2. **Identifying the Biochemical Theory**: The biochemical theory of the origin of life suggests that life originated from a series of chemical reactions involving simple inorganic molecules that eventually led to the formation of organic molecules and then macromolecules.

3. **Key Components of the Theory**:
- **Chemical Reactions**: The theory emphasizes that chemical reactions are fundamental to the formation of life.
- **Formation of Molecules**: Initially, inorganic molecules (like nitrogen, phosphorus, carbon, and hydrogen) combined to form organic molecules.
- **Macromolecules**: These organic molecules then combined to form macromolecules, which are essential for life.
- **First Living Cell**: The formation of macromolecules eventually led to the creation of the first living cell.

4. **Conclusion**: The biologist who proposed this biochemical theory is Alexander Oparin. His ideas laid the groundwork for understanding how life could have originated from non-living chemical substances through biochemical processes.

**Final Answer**: Alexander Oparin.

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