Question

12. 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

Answer: (A)

4.5 to 4.7 billion years ago, the atmosphere of the earth consisted of methane and ammonia. In reducing atmosphere moderate energy sources were sufficient to produce amino acids and then protein. After that carbohydrate have formed.
So, the answer is 'NH₃ ,CH₄ , protein, carbohydrate'