Stanley Maers first periodic simulation experiment showed that, under the right conditons, Oparin\'s ancient atmosphere could allow for the formation of amino acids living cells DNA molecules. Plants Solution Ans. Correct option: A. Amino acids Stanley Miller tested Oparin-Haldane prebiotic soup hypothesis experimentally in 1953. He put CH4, H2 and NH3 dissolved in water in a 0.5 L flask after removing O2 from the apparatus by creating vacuum. The flask was heated to boil to mimic the ocean of primitive earth. The water vapour and gases reached another 5.0 L flask connected through insulated glass tube. This larger flask mimicked the atmosphere of earth. He provided energy for chemical reaction in the flask by electric sparks (mimicking thunders) through tungsten electrodes. The temperature of the reaction vessel reached around 900 K at the centre, and around 360 K at periphery. The reaction products exit the bottom of flask through another tube having condenser around it. The product condensed in the U-tube at the bottom, which in turn, was connected back to the 0.5 L flask. The reaction mixture and product cycled between the smaller and larger flask for a week. The chemical analysis of the condensed water in U-tube showed formation of amino acids, formic acid, urea and other organic compounds The experiment only produced simple organic molecules. It was meant to test if organic molecules form from simple inorganic compounds under prebiotic environmental conditions or not. It did not seek the evolution of cell from the starting materials- that took billions of years for abiogenesis to occur. Liposomes and DNA (polymer of nucleotides) can’t form under very hot condition (900 K) of the experiment, so were not isolated as stable product. The high temperature also is not suitable for the assembly of cell-like structures. Therefore, it did not produce cellular structures, so option B (living cells) and option E (plants) are also incorrect..

1. Stanley Maers first periodic simulation experiment showed that, under the right conditons,
Oparin's ancient atmosphere could allow for the formation of amino acids living cells DNA
molecules. Plants
Solution
Ans. Correct option: A. Amino acids
Stanley Miller tested Oparin-Haldane prebiotic soup hypothesis experimentally in 1953. He put
CH4, H2 and NH3 dissolved in water in a 0.5 L flask after removing O2 from the apparatus by
creating vacuum. The flask was heated to boil to mimic the ocean of primitive earth. The water
vapour and gases reached another 5.0 L flask connected through insulated glass tube. This larger
flask mimicked the atmosphere of earth. He provided energy for chemical reaction in the flask by
electric sparks (mimicking thunders) through tungsten electrodes. The temperature of the
reaction vessel reached around 900 K at the centre, and around 360 K at periphery. The reaction
products exit the bottom of flask through another tube having condenser around it. The product
condensed in the U-tube at the bottom, which in turn, was connected back to the 0.5 L flask. The
reaction mixture and product cycled between the smaller and larger flask for a week. The
chemical analysis of the condensed water in U-tube showed formation of amino acids, formic
acid, urea and other organic compounds
The experiment only produced simple organic molecules. It was meant to test if organic
molecules form from simple inorganic compounds under prebiotic environmental conditions or
not. It did not seek the evolution of cell from the starting materials- that took billions of years for
abiogenesis to occur. Liposomes and DNA (polymer of nucleotides) can’t form under very hot
condition (900 K) of the experiment, so were not isolated as stable product. The high
temperature also is not suitable for the assembly of cell-like structures. Therefore, it did not
produce cellular structures, so option B (living cells) and option E (plants) are also incorrect.