Organic compounds first evolved on earth and required for origin of life were

Options

A. Urea and amino acids
B. Proteins and nucleic acids
C. Protein and amino acids
D. Urea and nucleic acid

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the organic compounds that first evolved on Earth and are essential for the origin of life.

2. **Analyzing the Options**: The options provided are:
- A) Urea and Amino Acids
- B) Protein and Nucleic Acid
- C) Protein and Amino Acid
- D) Urea and Nucleic Acid

3. **Identifying Key Compounds**:
- **Proteins**: These are essential macromolecules that perform a variety of functions in living organisms, including structural support and catalyzing biochemical reactions.
- **Nucleic Acids**: These include DNA and RNA, which are crucial for storing and transmitting genetic information.

4. **Evaluating the Role of Each Option**:
- **Option A (Urea and Amino Acids)**: While amino acids are building blocks of proteins, urea is not a fundamental component for the origin of life.
- **Option B (Protein and Nucleic Acid)**: This option includes both proteins and nucleic acids, which are vital for life.
- **Option C (Protein and Amino Acid)**: Amino acids are important, but without nucleic acids, the genetic information transfer is not possible.
- **Option D (Urea and Nucleic Acid)**: Urea does not play a significant role in the origin of life.

5. **Conclusion**: Based on the analysis, proteins provide structural and functional roles, while nucleic acids are essential for genetic information. Therefore, the correct answer is **B) Protein and Nucleic Acid**.

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