The experiments of Miller and Urey enhanced the validity of Oparin's theory on the origin of life . They essentially

Options

A. discharged electricity into a medium consisting of water vapour , methane , ammonia , and hydrogen
B. were able to produce simple viruses
C. were able to produce a simple form of living organism after placing DNA in mixture of hydrogen and oxygen and irradiating it
D. were able to produce bacteria

Answer

A

Explanation

The mystery of the origin of life still eludes us. Two basic concepts are proposed: 1. Vitalistic - a vital force created life, 2. Mechanistic - forces of nature were instrumental. Oparin suggested that the primitive atmosphere was made up of gases like methane, ammonia, hydrogen, and water vapor. Miller discharged electricity through the above environment and found after a week, a variety of organic compounds, including amino acids were produced. Combinations of these then could theoretically have led to the build-up of complex molecules and eventually protoplasm.