During the origin and evolution of life, key biological compounds were progressively synthesised in ocean with the help of enery obtainable from

Options

A. Lightning
B. Ultraviolet light
C. Lightning as well as ultraviolet light
D. Combustion of certain compounds ?

Answer

To answer the question regarding the energy sources that facilitated the synthesis of key biological compounds in the ocean during the origin and evolution of life, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Context**: The question asks about the energy sources that contributed to the synthesis of biological compounds in the ocean during the early stages of life on Earth.

2. **Referencing the Chemical Theory**: The chemical theory proposed by scientists Oparin and Haldane provides insight into the conditions present on early Earth that led to the formation of life.

3. **Identifying Key Conditions**: According to the theory, several conditions existed during the origin of life:
- High temperatures (around 800 degrees Celsius).
- Presence of various gases (like NH3, CO2, H2, CH4, and water vapor).
- Torrential rains that created large water bodies.

4. **Determining Energy Sources**: The theory identifies two primary sources of energy that facilitated the synthesis of biological compounds:
- **Ultraviolet (UV) Rays**: These rays from the sun provided energy necessary for chemical reactions.
- **Lightning**: Lightning strikes also provided significant energy, contributing to the formation of complex organic molecules.

5. **Evaluating the Options**: The options given in the question are:
- A) Lightning
- B) Ultraviolet light
- C) Lightning as well as ultraviolet light
- D) Combustion of certain compounds

6. **Selecting the Correct Answer**: Based on the chemical theory, both lightning and ultraviolet light were crucial energy sources. Therefore, the correct answer is:
- **C) Lightning as well as ultraviolet light**.

### Final Answer:
The key biological compounds were progressively synthesized in the ocean with the help of energy obtainable from **lightning as well as ultraviolet light**.

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