A) enzymes
B) genes
C) proteins
D) viruses.
Correct Answer: B
Solution :
: In the primitive atmosphere of earth hydrogen was most abundant and reactive. Later water, ammonia and methane were formed. Complex organic compounds such as polypeptide chains, enzymes, and nucleotides were formed from simple organic compounds such as sugars, glycerol, fatty acids and amino acids by condensation, polymerization and oxidation processes. Formation of nucleotides (gene) lead to origin of life.
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