Wednesday, February 27, 2013

Early Earth And Origins Of Organic Molecules

THE EXPERIMENT Urey and Miller
Urey and Millers try out simulated hypothetical conditions thought at the time to be present on the early Earth, and well-tried for the occurrence of chemical origins of life. The experiment used wet (H2O), methane (CH4), ammonium hydroxide (NH3), and hydrogen (H2). The chemicals were all sealed inside a unimpregnated array of glass tubes and flasks connected in a loop, with one(a) flask half-full of liquid water and another flask containing a pair of electrodes. The liquid water was heated to induce evaporation, sparks were laid-off between the electrodes to simulate lightning through the gentle wind and water vapor, and thusly the atmosphere was cooled again so that the water could condense and course back into the first flask in a uninterrupted cycle.
WHY?
To examine what kind of environment would be necessary to allow life to begin.
THE GASES
The gases they used were methane (CH4), ammonia (NH3), hydrogen (H2), and water (H2O).
How did they simulate lightning?
Sparks were fired between the electrodes to simulate lightning through the atmosphere and water vapor.
RESULTS
10-15% of the carbon was now in the form of organic fertilizer compounds.

Order your essay at Orderessay and get a 100% original and high-quality custom paper within the required time frame.

Two percent of the carbon had formed some of the amino acids which are used to make proteins.
IMPORTANCE AND INFLUENCE TO THE HYPOTHESES
Millers experiment showed that organic compounds such as amino acids, which are natural to cellular life, could be made easily under the conditions that scientists believed to be present on the early earth.
WHY HIS THEORY WAS WRONG
In Millers UV experiments, he used a select wavelength to produce amino acids and screened out other wavelengths because they control amino acids. Yet both chemical-building and chemical-destroying light exists in sunlight. amino group acids are actually very delicate and readily break down under natural sunlight.If you want to get a full essay, order it on our website: Orderessay



If you want to get a full essay, wisit our page: write my essay .

No comments:

Post a Comment