What was the Miller and Urey experiment What did it demonstrate?

Answer 1

To see if biological compounds could form spontaneously on early Earth

To see if simple molecules can combine spontaneously.

To find out how biological molecules could have first formed

How life can evolve from nonliving matter

Answer 2

The goal of the famous 1953 Miller-Urey experiment was to test the Oparin-Haldane hypothesis, which postulated that Earth's early atmosphere was a reducing and could form organic compounds from simple molecules. They also suggested that the energy for this synthesis of organic compounds came from lighting and UV radiation.

As a result, Miller and Urey experiment created laboratory conditions like the ones thought to have existed on early Earth. Their apparatus included a warmed flask of water simulating the primeval sea and a system of hydrogen, methane, ammonia, and water vapor to mimic the hypothesized strongly reducing atmosphere on early Earth. They then discharged sparks, simulating lightning, in that atmosphere. The atmosphere was then cooled by a condenser, and water and dissolved compounds rained into the miniature sea. Interestingly, when Miller and Urey analyzed their collected samples, they discovered that this experiment yielded various amino acids found in organisms today such as alanine and glutamic acid as well oily hydrocarbons and other organic compounds. From these results, Miller and Urey concluded that the Oparin-Haldane hypothesis was correct: a strongly reducing atmosphere can produce organic molecules, a first step in the origin of life.

Answer 3

the miller-urey experiment was conducted in 1952 by scientists Stanley Miller and Harold Urey who created an early earth's atmosphere containing reducing inorganic gases(methane, ammonia,water vapors,nitrous oxide,nitrogen) and lightening to know how the life on earth started... the result was the production of organic substances like DNA base pairs(adenine) which may had triggered the first life form on earth.

Answer 4

The Miller-Urey experiment used a sealed container of gases which were thought to resemble the chemical composition of the planet Earth in its early history, before the evolution of life. These gases were subjected to electric sparks to simulate the effect of lightning. The interesting result was that amino acids were synthesized, which suggests that the chemicals necessary for the evolution of life could have been created by ordinary physical processes that took place in the early history of the Earth.