Question

The correct sequence for the manufacture of the compounds on the primitive earth is

• A. $NH_{3}$, $CH_{4}$, protein and carbohydrate
• B. protein, carbohydrate, water and nucleic acid
• C. $NH_{3}$, $CH_{4}$, carbohydrate and nucleic acid
• D. $NH_{3}$ carbohydrate, protein and nucleic acid

Answer 1

The Correct Option is D

The question asks for the correct sequence in which certain compounds were manufactured on the primitive Earth. To determine the correct sequence, we need to understand the context of prebiotic chemistry and the early conditions on Earth.

1. **Formation of Simple Molecules**:

• On primitive Earth, the atmosphere contained simple gases like ammonia (NH_{3}) and methane (CH_{4}). These were some of the first types of molecules to form.

2. **Formation of Carbohydrates**:

• Simple organic molecules such as carbohydrates formed next. These molecules could be synthesized through the polymerization of formaldehyde, itself formed from methane and ammonia under UV radiation or other catalytic processes.

3. **Formation of Proteins**:

• Proteins, which are polymers of amino acids, were likely formed after carbohydrates. Amino acids might have formed through chemical reactions in the primitive atmosphere and oceans.

4. **Formation of Nucleic Acids**:

• Nucleic acids such as RNA and DNA appeared later, possibly from simpler molecules joining together. These molecules are complex and require more specific conditions or catalysts for their formation.

Therefore, the correct sequence is ammonia (NH_{3}), carbohydrates, proteins, and nucleic acids. This sequence aligns with the chemical evolution theory that suggests life began from simpler molecules.

**Conclusion**:

The correct sequence for the manufacture of compounds on the primitive Earth is: ammonia (NH_{3}), carbohydrates, proteins, and nucleic acids.