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Question
Which of the following amino acids was not found to be synthesised in Millers’s experiment?
Options:
A .  Alanine
B .  Glycine
C .  Aspartic acid
D .  Glutamic acid
Answer: Option D
:
D
In 1953, Stanley Miller and his advisor Harold Urey created experimental conditions similar to the proposed conditions on early earth, by Oparin and Haldane, - high temperature, volcanic storms, reducing atmosphere containing methane, ammonia, hydrogenetc.They used a closed flask containing methane, ammonia, hydrogen(ratio 2:1:2) and passed steam over it by boiling water and connecting it with a glass tube. They needed an energy source to provide the conditions necessary for molecules to overcome their stability and fuse to form different structures. Miller and Urey took two tungsten electrodes and created a discharge between them, which raised the temperatures to almost 80C. In this high-energy chamber, they could synthesise several significant substances includingamino acids such asglycine, alanine and aspartic acid. Glutamic acid was not found in their observation.

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