QQuestion
Which reactants were used in the experiment of Miller and Urey regarding the chemical origin of life?
(a) Oxygen, Methane, Nitrogen dioxide
(b) Water, Methane, Ammonia, Hydrogen
(c) Methane, Hydrogen sulphide, Carbon monoxide
(d) Nitrous oxide, Methane, Carbon dioxide
✓Answer
(b) Water, Methane, Ammonia, Hydrogen
Explanation
Stanley Miller and Harold Urey proved the validity of Oparin and Haldane’s concept. In an experiment, Miller and Urey kept methane (CH₄), ammonia (NH₃) and hydrogen (H₂) in a ratio 2 : 2 : 1 within water vapour. Besides, they made arrangement for circulation of water vapour in the trough and they also spotted the connections to the trough to electrical sparking. After several days’ electrical sparking, several types of condensed organic molecules were produced. In 1951 Juan Oro was able to produce amino acids by mixing hydrogen cyanide and ammonia. Besides he could also produce adenine.
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